Global and Planetary Change最新文献

{"title":"A strong El Niño significantly affects CH4, CO2, H2O and energy fluxes as well as grain yield in a Thai rainfed rice field","authors":"Arnon Setsungnern ,&nbsp;Choosak Kunuthai ,&nbsp;Amnat Chidthaisong","doi":"10.1016/j.gloplacha.2025.104896","DOIUrl":"10.1016/j.gloplacha.2025.104896","url":null,"abstract":"<div><div>Rainfed rice fields are among the primary rice ecosystems in many Asian countries, including Thailand. High variability in rainfall amount and its distribution under climate change and climate variability, such as El Niño, has made this rice ecosystem highly vulnerable. Here, we report the impacts of El Niño on methane (CH₄), carbon dioxide (CO₂), water (H₂O), energy exchanges, and grain yield in a Thai rainfed lowland rice using the eddy covariance method during 2015–2017. During the rice-growing season, cumulative rainfall and effective rainfall were reduced in the 2015 strong El Niño year by approximately 18.3 % and 19.8 % compared to the neutral years (2016 and 2017), respectively. This resulted in a lower water level (WL) above the paddy surface and required more irrigation water (IWR), especially at the pre-booting stage. A correlation analysis revealed that WL had a strong relationship with CH₄ (<em>r</em> = 0.72) and gross primary production (GPP; r = 0.72) at the pre-booting stage. CH₄ emissions during the cropping season in the 2015 El Niño year were reduced by 56.77 %. In 2015, gross primary production (GPP) during the cropping season was also reduced by 31.5 % and 26.5 % compared to 2016 and 2017, respectively, leading to a decrease in the annual net carbon (C) budget (58.2 g C m⁻²), up to 66.8 % in comparison with 2016 (143.86 g C m⁻²). Moreover, a higher fraction of sensible heat (H) exchange as a higher Bowen ratio along with high net radiation (Rn) in 2015 led to higher evapotranspiration, especially in the post-booting stage. The strong El Niño in 2015 reduced grain yield by 2.8–5.7 %, with less carbon use efficiency (CUE) and water use efficiency (WUE) relative to the non-strong El Niño year. Strong ENSO decreased net C budget and increased net GHG budget during the cropping season. An evaluation and prediction of the amount of rainfall for water supply during strong ENSO phenomena could be an effective measure before rice cultivation in rainfed paddies to prevent crop yield loss from climate oscillations.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104896"},"PeriodicalIF":4.0,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Control of temperature on the weathering of slow-eroding post-orogenic terrains","authors":"Zhewen Xu ,&nbsp;Lianwen Liu ,&nbsp;Hongbo Zheng ,&nbsp;Junfeng Ji ,&nbsp;Jun Chen ,&nbsp;H. Henry Teng ,&nbsp;Gaojun Li","doi":"10.1016/j.gloplacha.2025.104901","DOIUrl":"10.1016/j.gloplacha.2025.104901","url":null,"abstract":"<div><div>The long-term climate stability of the Earth has been attributed to the negative feedback between the rate of CO₂-consuming silicate weathering and the partial pressure of atmospheric CO₂. It is generally believed that the capability of silicate weathering in feedbacking climate is mainly associated with the rapid-eroding mountains where fresh bedrock adequately exposes. In contrast, the slow-eroding terrains are considered to have low climate sensitivity of silicate weathering due to the almost complete depletion of CO₂-consuming Ca and Mg cations in highly-weathered top regolith. However, much of the Earth's history, marked by tectonic quiescence and slow erosion, has also exhibited significant climate stability. Here we demonstrate that the slow-eroding post-orogenic terrains exceptionally show strong temperature dependence of silicate weathering. This conclusion is drawn from a historical reconstruction of the weathering-derived clay production over the past ∼23 million years, based on the sediments from the Ocean Drilling Program sites 1147/1148 offshore from the South China continent. We employ a sensitive proxy, the Rb/Zr ratio of fine sediments, showing that weathering of exposed granitic plutons closely tracks temperature changes. The resulting apparent activation energy (<em>Ea</em>) of silicate weathering (77.1 ± 14.9 kJ/mol) is significantly higher than previous estimations for the slow-eroding terrains. Given the temporal and spatial dominance of slow-eroding terrains on global weathering flux, our findings suggest that the strong temperature dependence of weathering in these settings would largely enhance the sensitivity of global silicate weathering flux in response to temperature changes. This may help to explain the Earth's climate stability, particularly during periods of tectonic quiescence.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104901"},"PeriodicalIF":4.0,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extreme events in the Indian monsoon during the Bølling–Allerød interstadials as documented in a core monsoon zone speleothem record","authors":"Anil K. Gupta ,&nbsp;Priyantan Gupta ,&nbsp;Steven C. Clemens ,&nbsp;Bhajendra Majhi ,&nbsp;Hai Cheng","doi":"10.1016/j.gloplacha.2025.104902","DOIUrl":"10.1016/j.gloplacha.2025.104902","url":null,"abstract":"<div><div>Major shifts in the Indian Summer Monsoon (ISM) are evident in a U-Th-dated composite δ¹⁸O record from Kailash Cave (KGC) in central India. The composite oxygen isotope record combines previously published data with the present data from sample KG-1, ranging in age from 14.62 to 12.97 thousand year before the Present (1950) (kyr BP), during the Bølling-Allerød (B-A) interstadials. Petrographic analysis of KG-1, spanning ∼14.44 to 13.98 kyr BP, reveals long-term coherence between the stable isotope values and petrographic elements. The KGC record shows an increase in ISM intensity with high-frequency δ¹⁸O variability during the Bølling (14.62–14.02 kyr BP), followed by stabilization in the Allerød (14.02–12.97 kyr BP) with low-frequency oscillations. At the onset of the B-A interstadials, coincident warming (cooling) in the northern (southern) hemisphere induced a bipolar see-saw effect, displacing the Intertropical Convergence Zone northward and intensifying the ISM. Multi-centennial to millennial ISM variations are driven by atmospheric temperature over the Tibetan Plateau (TP) and equatorial Indian Ocean (IO) sea surface temperature (SST) fluctuations. High-frequency monsoon shifts at multidecadal to centennial scales likely reflect extreme wet-dry episodes linked to changes in solar activity, temperature of TP and IO SST. These findings suggest that solar activity, in conjunction with coupled ocean-atmosphere interactions, have played a pivotal role in driving ISM variability during the B-A interstadials. Additionally, the increased greenhouse gas concentrations during this period might have triggered extreme climatic events, more prevalent in the warmer Bølling, serving as a modern analogue for current global warming scenario.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104902"},"PeriodicalIF":4.0,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uplift-enhanced Neogene silicate weathering intensity over the northern East Asian summer monsoon region","authors":"Chengcheng Ye ,&nbsp;Yibo Yang ,&nbsp;Zengguang Guo ,&nbsp;Yong Xue ,&nbsp;Zhuoxian Chen ,&nbsp;Weilin Zhang ,&nbsp;Yudong Liu ,&nbsp;Xiaomin Fang","doi":"10.1016/j.gloplacha.2025.104899","DOIUrl":"10.1016/j.gloplacha.2025.104899","url":null,"abstract":"<div><div>The Neogene evolution of the Asian monsoon and East Asian silicate weathering remains debated. Previous reconstructions of the silicate weathering intensity (SWI) from the Asian interior and the South China Sea have shown a notable long-term decrease since the mid-Miocene, which has been attributed primarily to global cooling. However, considerable geologic evidence indicates that uplift of the northern Tibetan Plateau occurred mainly during the Neogene, and modelling studies suggest that this uplift intensified the monsoon precipitation in East Asia, which should have increased the SWI. It is therefore difficult to explain the absence of the impact of tectonic uplift on Neogene SWI evolution. Here, we present 23–5 Ma weathering records from the northern East Asian monsoon region (EAM). Our results revealed a long-term increase in the SWI since the mid-Miocene, in contrast to the decrease in the SWI in the South China Sea and the Asian interior. We speculate that the interplay between tectonic uplift and Neogene cooling has created a contrasting pattern of silicate weathering in East Asia. The increase in the SWI in the northern EAM was largely due to the uplift-intensified East Asian summer monsoon in North China, while the decrease in the SWI in the southern EAM was due to global cooling, with both cooling and uplift driving the decrease in the SWI in the Asian interior. The proposed pattern of SWI evolution in East Asia reconciles the discrepancies among regional weathering reconstructions, offering new insights into the interactions among plateau uplift, global cooling, and continental weathering.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104899"},"PeriodicalIF":4.0,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Persistently centennial to millennial variability of Asian summer monsoon and north-south coupling during the late penultimate glacial period","authors":"Wei Huang ,&nbsp;Zhenqiu Zhang ,&nbsp;Kan Zhao ,&nbsp;Yongjin Wang ,&nbsp;Qingfeng Shao ,&nbsp;Jinguo Dong ,&nbsp;Xiuyang Jiang ,&nbsp;Xiumin Zhai ,&nbsp;Carlos Pérez-Mejías","doi":"10.1016/j.gloplacha.2025.104898","DOIUrl":"10.1016/j.gloplacha.2025.104898","url":null,"abstract":"<div><div>The Dansgaard-Oeschger (DO) recurrence is a prominent feature during the last glaciation, yet its characteristics during older glacial periods remain unclear. Here, we present a precisely-dated, high-resolution stalagmite record from Luoshui Cave in central China, revealing millennial- and centennial-scale variability of the Asian summer monsoon (ASM) during 146–136.6 ka BP (before 1950 CE). The isotopic compositions of stalagmite LS12 capture comprehensive ASM signals, with δ¹⁸O reflecting ASM strength and δ¹³C providing insights into regional rainfall changes. Interestingly, the prominently larger amplitudes of δ¹³C compared to δ¹⁸O suggest that biological and soil processes are more sensitive to climate changes, particularly during DO-like oscillations. The climate background during the Marine Isotope Stage (MIS) 6.3/6.2 transition is similar to the MIS 3/2 transition, leading to comparable Heinrich stadial structures and other millennial-scale events. By combining δ¹⁸O and δ¹³C profiles, we identify six millennial-scale interstadial events, which are consistent with records from the Northern Hemisphere (in-phase) and Southern Hemisphere (anti-phase). Moreover, these coupling relationships remain hold over multi-centennial scales, suggesting the persistence of a bipolar seesaw mechanism at shorter timescales. Spectral analyses reveal a dominant periodicity of ∼1–2 kyr, with increased high-frequency components after 141 ka BP, likely linked to changes in boundary conditions, increased instability in ocean circulation, and enhanced solar activity. This study provides strong evidence that millennial-scale climate instability is a persistent feature of glacial periods, with the Southern Ocean potentially modulating the duration and stability of Northern Hemisphere interstadial events, in addition to traditional northern drivers.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104898"},"PeriodicalIF":4.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biogeochemical characteristics and phytoplankton community diversity of the Western North Equatorial current","authors":"Lina An ,&nbsp;Yibin Huang ,&nbsp;Chao Xu ,&nbsp;Feipeng Xu ,&nbsp;Jixin Chen ,&nbsp;Xin Liu ,&nbsp;Bangqin Huang","doi":"10.1016/j.gloplacha.2025.104895","DOIUrl":"10.1016/j.gloplacha.2025.104895","url":null,"abstract":"<div><div>The North Equatorial Current (NEC) is an essential part of the global warm pool and plays a key role in the subtropical and tropical circulation systems of the North Pacific. As the current is transported from east to west, significant changes in the structure and function of the associated ecosystem are expected. However, the complexity of the current systems and the region's remote location far from the continent have resulted in limited observational data, leaving biogeographic distributions, phytoplankton diversity, and their driving mechanisms poorly understood. To bridge this gap, we used a multidisciplinary approach of field and satellite observations, reanalysis data, and BGC-Argo data to gain a more comprehensive understanding of the NEC. The results revealed that the biogeochemical characteristics of the NEC were regulated by seasonal variations and also exhibited spatial differences. The diversity of phytoplankton communities was primarily controlled by the NEC transport but was additionally influenced by mesoscale eddies. Chlorophyll <em>a</em> concentrations in the NEC decreased from east to west but increased again near the Mindanao Eddy. The Shannon-Wiener diversity index was lowest on the western side of the NEC, showing significant differences compared to the other stations. Our findings suggested that ocean currents, in conjunction with mesoscale eddies, acted as both transport pathways and diffusion barriers, thereby influencing phytoplankton diversity. This study provided essential reference data for the future conservation of marine ecosystems and fishery resources in the northwestern Pacific.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104895"},"PeriodicalIF":4.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Different impacts of temperature and precipitation on vegetation net primary production of global marsh wetlands","authors":"Jiaqi Zhang ,&nbsp;Meiling Zhao ,&nbsp;Rong Ma ,&nbsp;Mingming Feng ,&nbsp;Chen Ding ,&nbsp;Liyuan Wu ,&nbsp;Xianguo Lu ,&nbsp;Xiangjin Shen ,&nbsp;Ming Jiang","doi":"10.1016/j.gloplacha.2025.104893","DOIUrl":"10.1016/j.gloplacha.2025.104893","url":null,"abstract":"<div><div>Until recently, the spatial-temporal changes and driving factors of vegetation net primary productivity (NPP) in global marsh wetlands remain unclear. Based on climate and MODIS NPP data, this study investigated the spatial-temporal variations of NPP and their response to climate variations in global marshes. The results indicated that annual NPP of global unchanged marshes showed a significant upward trend (16.1 g C·m⁻²/10a) during 2000–2022. The impacts of climate variations on marsh vegetation NPP exhibited different patterns in different regions. Annual temperature warming significantly increased NPP in global marshes, and this positive effect gradually weakened in warmer regions. We further found that the positive effects of daytime and nighttime warming on increasing NPP were asymmetric, with daytime warming having a more significant positive impact. At cold, high northern latitudes, the asymmetric positive impact was more significant. However, at hot low latitudes, the results were opposite: warming temperatures had asymmetric negative effects on marsh vegetation NPP. For the impacts of precipitation, precipitation had insignificant influence on global marsh NPP. But at arid mid-latitudes, increasing precipitation significantly increased marsh vegetation NPP, and the increasing effect gradually strengthened in warmer regions. Our results indicate that even in marsh with abundant water, the vegetation is also limited by available water in relatively arid environments. This study highlights different impacts of temperature and precipitation on marsh vegetation NPP in different regions, and suggests that the asymmetric effects of daytime and nighttime warming should be considered in ecosystem model simulations of global marsh vegetation productivity.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104893"},"PeriodicalIF":4.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced vegetation green-up onset in regions with cooling air temperatures in the Northern Hemisphere: Drivers and impacts on productivity","authors":"Nan Jiang ,&nbsp;Miaogen Shen ,&nbsp;Zhiyong Yang","doi":"10.1016/j.gloplacha.2025.104891","DOIUrl":"10.1016/j.gloplacha.2025.104891","url":null,"abstract":"<div><div>Climate warming was considered the primary driver of the advanced vegetation green-up onset date (VGD) in the Northern Hemisphere. However, the continuous advancement of VGD at the hemispheric scale during the hiatus in spring warming remains unexplained. Using high-quality satellite and multiple environmental datasets, we revealed two causes of VGD advancement during 2000–2014 (a period when a warming hiatus occurred) over the mid-to-high latitudes of the Northern Hemisphere. Firstly, VGD advanced despite pre-VGD cooling air temperature, which was associated with enhanced radiation, increased precipitation, higher soil temperature, elevated soil moisture, and earlier snowmelt dates, in 20.4 % of the study area, mostly located in northern North America, eastern Europe, and northeastern Asia. The VGD advancements resulted in widespread increases in spring vegetation greenness and gross primary productivity in these areas. Secondly, in some areas with weak pre-VGD air warming, strong sensitivity of VGD to air temperature resulted in substantial VGD advancement (e.g., eastern Canada, southern Europe, and central China); conversely, in some areas with pre-VGD cooling air, weak temperature sensitivity resulted in limited VGD delay (e.g., Canadian Prairies, southeastern Russia, and northern Ural region). These findings underscore the importance of considering factors beyond air temperature as well as the significance of the spatial correspondence between phenological temperature sensitivity and changes in air temperature when attributing large-scale phenological changes. These insights are crucial for understanding phenological responses to climatic changes and their implications for terrestrial carbon cycling.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104891"},"PeriodicalIF":4.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of surface processes and deep crustal rheology in the steady-state LongMenShan building: Insights from geodynamic modeling","authors":"Hui Yang ,&nbsp;YuanZe Zhou ,&nbsp;Hua Wu ,&nbsp;JiWen Teng","doi":"10.1016/j.gloplacha.2025.104894","DOIUrl":"10.1016/j.gloplacha.2025.104894","url":null,"abstract":"<div><div>It is widely accepted that the horizontal tectonic forces and lateral rheological contrast control the strain localization and, consequently, the evolution of mountain ranges. However, in active orogenesis involving massive surface materials redistribution, to what extent and in which way do surface processes and strong contrast in vertical rheological properties manage the stress transmission and strain partitioning, have been the subject of critical debate and discussion. The LongMenShan (LMS) area exhibits the steepest topographic gradient around the Tibetan Plateau. Understanding the interplay among the abnormal steep relief, slow convergence rate, and rapid erosion rate is crucial for comprehending how surface processes and vertical rheological configurations contribute to the evolution mechanisms of the Eastern Tibetan Plateau (ETP). In this study, 2-D finite element models were employed to retrieve robust relationships between surface topography and deep material transport in the ETP and LMS. These models considered fundamental mechanical parameters, particularly the erosion rate and mid-crustal rheological configuration. The results indicate that regional tectonization governs the tectonodeformation mechanism and surface geomorphic characteristics of the study area. Differential erosion is shown to significantly influence the shaping of peripheral topography and alter the substantial seismic potential across different faults. Between the LongRiBa Faults (LRBF) and the LMS, the weak mid-crust material decouples the upper and lower crusts via vertical strain partitioning. This decoupling affects the formation of deep detachment structures in the LMS and promotes the brittle shortening of the upper crust, contributing to the region's steep relief. Lastly, our results suggest that channel flow and brittle crustal shortening modes are not mutually competitive but rather coexist in different regions of the ETP and LMS. Deep processes, influenced by inherited lithospheric heterogeneities, play a decisive role during the formation of the ETP and LMS. Our results underscore the importance for understanding the underpinning geodynamic mechanisms that shape the eastern margin of the Tibetan Plateau.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104894"},"PeriodicalIF":4.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Warming promotes soil carbon sequestration in the Tianshan Mountains","authors":"Li-yuan Zheng ,&nbsp;Yong Zhang ,&nbsp;Lei Tang ,&nbsp;Chao Lu ,&nbsp;Bo Tan ,&nbsp;Lai Jiang ,&nbsp;Jin-meng Tang ,&nbsp;Cheng-bang An","doi":"10.1016/j.gloplacha.2025.104892","DOIUrl":"10.1016/j.gloplacha.2025.104892","url":null,"abstract":"<div><div>Alpine ecosystems are critical components of the global carbon cycle, not only because they store substantial organic carbon, but also due to their high sensitivity to climate change, which has garnered considerable scientific interest. However, under ongoing climate warming, the dynamics and underlying mechanisms of alpine soil organic carbon (SOC) are not yet quantified, thereby introducing uncertainties in predictions of carbon–climate feedbacks. To elucidate the response mechanisms of soil carbon dynamics in alpine ecosystems, this study focuses on the Tianshan Mountains—a representative alpine system in the arid region of Central Asia—through an integrated approach combining field surveys and published data. The results showed that SOC content exhibited a clear altitude-dependent pattern across different vegetation types, and that climate warming generally promoted SOC sequestration in alpine soils. Linear mixed-effects analysis indicated that SOC sequestration may be enhanced via two key mechanisms: (1) warming promotes the accumulation of plant-derived microbial-transformed carbon; and (2) warming promotes carbon stabilization through soil weathering processes. These findings advance our mechanistic understanding of altitudinal SOC dynamics under climate change and provide quantitative evidence that alpine ecosystems act as persistent carbon sinks, which has significant potential for global climate regulation.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"252 ","pages":"Article 104892"},"PeriodicalIF":4.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}