Agricultural and Forest Meteorology最新文献

{"title":"Interannual climatic sensitivity of surface energy flux densities and evapotranspiration in a disturbed and rewetted ombrotrophic bog","authors":"J.L. Exler ,&nbsp;J. Skeeter ,&nbsp;A. Christen ,&nbsp;R.D. Moore","doi":"10.1016/j.agrformet.2025.110501","DOIUrl":"10.1016/j.agrformet.2025.110501","url":null,"abstract":"<div><div>This study quantified surface energy balance and evapotranspiration in a <em>Sphagnum</em>-dominated ombrotrophic bog located near their southern limit in western North America (49.13<span><math><msup><mrow></mrow><mo>∘</mo></msup></math></span> N, 122.98<span><math><msup><mrow></mrow><mo>∘</mo></msup></math></span> W) from summer 2014 through 2022 to assess the bog's sensitivity to future climatic conditions, particularly to increasing severity and duration of drought conditions. Precipitation exceeded evapotranspiration in winter, but net surface water exchange was negative for between four and six months in summer. Shifts in surface water exchange towards net gain occurred consistently between early September and late October; the timing of the shift towards net loss was less consistent in spring, ranging from mid-February to mid-May. Daily evapotranspiration was primarily driven by net radiation and vapour pressure deficit. Surface moisture availability, as represented by water table depth, was a secondary control. Evapotranspiration tended to decline with increasing water table depth, with a slight flattening of the relation below a depth of about 0.058 m. The initial, more rapid, rate of decline is hypothesized to reflect a decrease of surface ponding and the decreased effect at greater depths to be associated with continued supply of water to the peat surface by capillary transport. Albedo increased from about 0.10 to 0.14 over each growing season, but the negative feedback on available energy for evapotranspiration at the peat surface was minimal. Net radiation did not vary substantially among years, and maximum seasonal water table drawdown appeared to be most strongly associated with growing season vapour pressure deficit, and was not correlated with the duration of seasonal net water loss to the atmosphere. In a climate change context, this study suggests that the ecohydrological response of ombrotrophic bogs will be most sensitive to changes in summertime vapour pressure deficit, which is projected to increase in the future.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110501"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifactorial interactions contribute to contrasting wildfire trends at mid–high latitudes of the Northern Hemisphere","authors":"Hang Zhao ,&nbsp;Zhengxiang Zhang ,&nbsp;Shuo Zhen ,&nbsp;Xin Wang ,&nbsp;Yiwei Yin","doi":"10.1016/j.agrformet.2025.110507","DOIUrl":"10.1016/j.agrformet.2025.110507","url":null,"abstract":"<div><div>The contrasting changes in wildfires reflect their diverse responses to bioclimates, vegetation dynamics, and human activities. However, how wildfire drivers interact to shape contrasting wildfire dynamics remains unclear. Here, wildfire dynamics at mid–high latitudes (≥30°N) were analyzed using a burned area dataset from 1982 to 2018. We integrated structural equation modeling with fire regime triangle theory to define flammability, fuel, and human ignition as latent variables, thus explaining the major causes of contrasting wildfire trends. Wildfires increased in 2.91 % of land areas and decreased in 8.30 % at mid–high latitudes, exhibiting contrasting trends within and across ecoregions, in which flammability, fuel, and human ignition had impacts on wildfires with ratios of 0.63, 0.56, and 0.50, respectively. Temperature-driven flammability variations led to increasing trends in wildfires in fuel-rich forests, while increasing flammability, combined with reduced fuels from water deficits, caused decreasing trends in wildfires, especially in arid temperate grasslands. Moreover, increased natural and human ignitions led to increasing trends in wildfires in high-latitude ecosystems, whereas intensified human activities suppressed wildfires in densely populated areas, leading to declining wildfire trends. These results suggest that flammability impacts wildfire trends oppositely depending on fuel conditions, and human ignition has polarized effects on wildfire trends due to varying intensity and direction of human activities. Such interactions contribute to contrasting wildfire trends and imply that warmer climates and human activities will exacerbate contrasting wildfire dynamics. Our study improves the understanding of long-term wildfire trends, aids in exploring terrestrial carbon cycles under climate change, and supports practical wildfire management.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110507"},"PeriodicalIF":5.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shifts in soil freeze-thaw cycle and their climate impacts along the alpine wetland-grassland continuum","authors":"Jianbin Wang ,&nbsp;Juanjuan Zhang ,&nbsp;Dong Xie ,&nbsp;Jiumei Ma ,&nbsp;Yijie Zhao ,&nbsp;Shijie Ning ,&nbsp;Chao Song ,&nbsp;Zhenhua Zhang ,&nbsp;Jianxiao Zhu ,&nbsp;Jin-Sheng He ,&nbsp;Hao Wang","doi":"10.1016/j.agrformet.2025.110506","DOIUrl":"10.1016/j.agrformet.2025.110506","url":null,"abstract":"<div><div>Climate change and human activity have profoundly altered soil hydrology, reshaping the areal extent and boundaries of wetland ecosystems. However, the impact of these shifts on the soil freeze-thaw cycle and their subsequent influence on greenhouse gas emissions remains poorly understood. This knowledge gap is particularly critical in high-latitude and high-altitude regions, which harbor substantial carbon stocks and exhibit distinct seasonal soil freeze-thaw cycles. Here, we conducted year-round field monitoring of the soil freeze-thaw cycle along an alpine wetland-grassland continuum on the Tibetan Plateau. We found that as the landscape transitioned from mesic meadow to wet meadow and then to fen, soils tended to freeze later (with delays of 4 and 24 days, respectively), more slowly (with reductions of 55.8% and 45.7%, respectively), and at shallower depths (with reductions of 59.7% and 57.8%). By combining high-resolution greenhouse gas carbon flux and energy exchange monitoring, we further found that soil thawing increased CO₂ and CH₄ emissions, inducing pronounced positive climate-carbon feedbacks, which were stronger in magnitude than the negative climate-carbon feedbacks associated with soil freezing (+632.1 vs -183.1 g CO₂-eq m^-2). In contrast, both soil thawing and freezing resulted in significant negative climate feedbacks due to net reductions in sensible and latent heat fluxes. These findings underscore the critical role of hydrological-driven shifts in the soil freeze-thaw cycle, highlighting their interactive effects on climate-carbon and climate-energy feedbacks.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110506"},"PeriodicalIF":5.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two improved shuttleworth-wallace models for estimating consecutive daily evapotranspiration","authors":"Jinfeng Zhao ,&nbsp;Shikun Sun ,&nbsp;Yali Yin ,&nbsp;Enhao Wang ,&nbsp;Chong Li ,&nbsp;Jingxin Sun ,&nbsp;Yihe Tang ,&nbsp;Yubao Wang","doi":"10.1016/j.agrformet.2025.110498","DOIUrl":"10.1016/j.agrformet.2025.110498","url":null,"abstract":"<div><div>Remote sensing-based evapotranspiration (ET) models have been widely employed to quantify regional ET. However, mapping consecutive daily ET with high accuracy and fine spatiotemporal resolution remains challenging. This study developed a pre-processing model (SWH-mTSF) and a post-processing model (SWH-ETrF) to enhance the temporal continuity of estimates from an improved Shuttleworth-Wallace (SWH) model. The models were applied to estimate ET in the Loess Plateau of northern Shaanxi (LPNS) from 2002 to 2009 at 1-day temporal and 1-km spatial resolution. The SWH-mTSF model enhanced the temporal resolution and quality of remote sensing-based LAI/FPAR using data assimilation, producing continuous daily ET estimates through physical mechanisms. Conversely, the SWH-ETrF model interpolates the SWH-simulated ET time series by using the alfalfa reference ET (<em>ET_r</em>) as a benchmark. Both models were comprehensively evaluated using flux measurements at the Changwu station and state-of-the-art products (MOD16A2 and PML-V2). Evaluation at Changwu station showed SWH-ETrF (<em>r</em>=0.83, <em>RMSE</em>=0.68 mm/day) outperformed SWH-mTSF (<em>r</em>=0.66, <em>RMSE</em>=0.86 mm/day) in simulating ET at daily and seasonal scales, effectively capturing annual ET fluctuations. Compared to PML-V2 (which overestimated ET) and MOD16A2 (which underestimated ET), the SWH-ETrF model provided more reliable ET estimates for cropland and grassland in the LPNS. Variance-based global sensitivity analysis revealed that meteorological variables had a stronger influence on ET estimates than physiological vegetation parameters (LAI/FPAR) in arid and semi-arid cropland regions. The SWH-ETrF model remained robust even with fewer ET measurements. These advantages make SWH-ETrF well-suited for regional and global applications due to its simplicity and efficiency.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110498"},"PeriodicalIF":5.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling carbon and water fluxes in agro-pastoral systems under contrasting climates and different management practices","authors":"L. Leolini ,&nbsp;S. Costafreda-Aumedes ,&nbsp;L. Brilli ,&nbsp;M. Galvagno ,&nbsp;M. Bindi ,&nbsp;G. Argenti ,&nbsp;D. Cammarano ,&nbsp;E. Bellini ,&nbsp;C. Dibari ,&nbsp;G. Wohlfahrt ,&nbsp;I. Feigenwinter ,&nbsp;A. Dal Prà ,&nbsp;D. Dalmonech ,&nbsp;A. Collalti ,&nbsp;E. Cremonese ,&nbsp;G. Filippa ,&nbsp;N. Staglianò ,&nbsp;M. Moriondo","doi":"10.1016/j.agrformet.2025.110486","DOIUrl":"10.1016/j.agrformet.2025.110486","url":null,"abstract":"<div><div>Grasslands are worldwide spread ecosystems involved in the provision of multiple functional services, including biomass production and carbon storage. However, the increasingly adverse climate and non-optimised farm management are threatening these ecosystems. In this study, the original semi-mechanistic remotely sensed-driven VISTOCK model, which simulates grass growth as limited by thermal and water stress, was modified and integrated with the RothC model to simulate the ecosystem fluxes. The new model (GRASSVISTOCK) showed satisfactory performance in simulating above-ground biomass (AGB) in dry matter (d.m.) and fractional transpirable soil water (FTSW) along Alps (AGB, RMSE = 85.39 g d.m. m⁻²; FTSW, RMSE = 0.21) and Mediterranean (AGB, RMSE = 136.84 g d.m. m⁻²; FTSW, RMSE = 0.13) grasslands. Also, GRASSVISTOCK was able to simulate the net ecosystem exchange (NEE - RMSE = 0.03 Mg C ha⁻¹), the gross primary production (RMSE = 0.04 Mg C ha⁻¹), the ecosystem respiration (RMSE = 0.04 Mg C ha⁻¹) and the evapotranspiration (RMSE = 1.44 mm), where these observations were available (Alps). The model was applied under present and two climate datasets characterised by temperature increase and precipitation decrease (+2 °C temperature, -10 % precipitation) and reference or enriched CO₂ concentration (394 vs. 540.5 ppm) scenarios. The results showed that, while changes in temperature and precipitation alone had a negative impact by increasing NEE (+0.69 Mg C ha⁻¹) and decreasing total biomass (-0.20 Mg d.m. ha⁻¹) in the reference CO₂ scenario, the enriched atmospheric CO₂ concentration partially smoothed the NEE trend (+0.27 Mg C ha⁻¹) and increased total biomass (+0.60 Mg d.m. ha⁻¹) compared to the present period. It is concluded that the GRASSVISTOCK model represents a first step towards an integrated tool for estimating the performance of the agro-pastoral systems in terms of biomass production, water and carbon fluxes, in the face of ongoing climate change.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110486"},"PeriodicalIF":5.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contributions of diffusion and ebullition processes to total methane fluxes from a subtropical rice paddy field in southeastern China","authors":"Tingting Zhu ,&nbsp;Yanlian Zhou ,&nbsp;Weimin Ju ,&nbsp;Yu Mao ,&nbsp;Rui Xie","doi":"10.1016/j.agrformet.2025.110504","DOIUrl":"10.1016/j.agrformet.2025.110504","url":null,"abstract":"<div><div>Diffusion and ebullition are two important processes regulating methane (CH₄) emission from rice fields. Studies on diffusion and ebullition CH₄ fluxes can provide the scientific foundation for better investigating the impact of climate change on CH₄ emission. In this study, we measured CH₄ fluxes using the static chamber (CC) and eddy covariation (EC) methods over a subtropical rice paddy field in southeastern China in 2021 and 2022. In addition, the diffusive and ebullition fluxes of CH₄ were quantified according to CC measurements and estimations from EC data using the wavelet analysis (WW) method. The total and diffusive fluxes obtained by CC and WW methods were both significantly correlated at the hourly and daily scales. However, the correlation between ebullition fluxes obtained by CC and WW methods was insignificant. The CC measurements indicated that the dominant role of the diffusive process in contributing to CH₄ fluxes, accounting for 89 % and 91 % of the total CH₄ flux in rice paddy in 2021 and 2022, respectively. The total, diffusive, and ebullition CH₄ fluxes all peaked at 13:00. Air temperature and water table depth acted as the most important factors regulating the seasonal variations of total and diffusive CH₄ fluxes at this rice field. Overall, the study provided valuable insights into the CH₄ flux dynamics in rice paddies, which can inform the development of process-based models for simulating CH₄ emission in rice paddies.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110504"},"PeriodicalIF":5.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of photovoltaic plants on dryland vegetation phenology revealed by time-series remote sensing images","authors":"Zilong Xia ,&nbsp;Yingjie Li ,&nbsp;Shanchuan Guo ,&nbsp;Encai Bao ,&nbsp;Bo Yuan ,&nbsp;Ruishan Chen ,&nbsp;Pengfei Tang ,&nbsp;Chenghan Yang ,&nbsp;Peijun Du","doi":"10.1016/j.agrformet.2025.110505","DOIUrl":"10.1016/j.agrformet.2025.110505","url":null,"abstract":"<div><div>To limit global warming, solar energy production is expanding in drylands globally. This study investigated phenological changes caused by photovoltaic (PV) plants in China's drylands using satellite-derived metrics. The results show that the deployment of PV plants has advanced the start of the growing season (SOS) by a median of 13.7 days, while extending the length of the growing season (LOS) by a median of 16.3 days in arid and semi-arid drylands. Soil moisture was the main factor influencing phenological changes in these regions, indicating that the evaporation-reducing effect of PV panels strongly regulates phenology. In sub-humid drylands, solar radiation was the primary factor, with shading effects delaying SOS and shortening LOS. The phenology of PV plants in these regions did not show significant changes, possibly because the shading effect of the PV panels delays SOS and shortens LOS, which may counteract the effects of increased soil moisture on phenology.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110505"},"PeriodicalIF":5.6,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nigeria vegetation trend during recent West African monsoon season and the near future implications in CORDEX-Africa","authors":"Ugochukwu K. Okoro ,&nbsp;Chijioke U. Opara ,&nbsp;Hyacinth C. Nnamchi ,&nbsp;Wen Chen","doi":"10.1016/j.agrformet.2025.110499","DOIUrl":"10.1016/j.agrformet.2025.110499","url":null,"abstract":"<div><div>This study investigated the impact of recent West African monsoon seasonal rainfall on the vegetation trend in Nigeria. Using Mann-Kendall test, the satellite estimates revealed increasing trends in the mean Normalized Difference Vegetation Index (NDVI) at 95 % in area of the location between 1981 and 2020 with statistical significance (at<span><math><mrow><mspace></mspace><mi>α</mi><mo>≤</mo><mn>0.5</mn></mrow></math></span> levels of significance) in the south-western States. The 6-month Standardized Precipitation Index (SPI) from the Climate Research Unit (CRU) observational rainfall within the same period indicated increasing trends at 73 % of the area with statistical significance (at <span><math><mrow><mi>α</mi><mo>≤</mo><mn>0.5</mn></mrow></math></span> levels of significance) in the northern States above the 9° N latitude. From the temporal correlations between the seasonal rainfall and vegetation trends, there was significant (at 95 % confidence level from the <em>t</em>-test) positive characteristic impact on 89 % of the area. The CORDEX-Africa historical experiment outputs (1981–2005) of the selected models and the ensemble mean revealed strong correlation values with high normalized RMSE when representing the seasonal rainfall simulation. The bias-corrected output (2006–2020) in the RCP 8.5 experiment showed notably enhanced representation quality of the models and the ensemble mean, with 87 % of the area demonstrating “reasonable performance” efficiency. The 6-month SPI projection from 2021 to 2050 indicated positive trends in 84 % of the area. Indeed, the relative percentage difference between projected and baseline trends compellingly suggests a decrease in seasonal rains by 2050, intensifying the demand on vegetation and introducing additional climate challenges.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110499"},"PeriodicalIF":5.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linking soil extracellular enzymes with soil respiration under altered litter inputs","authors":"Hao Chen ,&nbsp;Qianhao Xu ,&nbsp;Kees Jan van Groenigen ,&nbsp;Bruce A. Hungate ,&nbsp;Pete Smith ,&nbsp;Dejun Li ,&nbsp;Daryl L. Moorhead ,&nbsp;Brooke B. Osborne ,&nbsp;Zilong Ma ,&nbsp;Jørgen E. Olesen ,&nbsp;Chaoqun Wang ,&nbsp;Ji Liu ,&nbsp;Xibin Sun ,&nbsp;Chengjin Chu ,&nbsp;Ji Chen","doi":"10.1016/j.agrformet.2025.110503","DOIUrl":"10.1016/j.agrformet.2025.110503","url":null,"abstract":"<div><div>Climate and land-use changes have altered both litter quality and quantity, with cascading impacts on soil respiration (SR). Soil extracellular enzymes (EEs) like cellulase and ligninase are crucial for deconstructing plant litter because they convert polymers into monomers. However, whether and how changes in litter inputs influence soil cellulase and ligninase activities as well as the implications for SR remain poorly understood. We conducted a global meta-analysis of 827 observations on the responses of SR and soil cellulase and ligninase activities to litter addition and litter removal. Litter addition significantly increased cellulase activity by 25 %, whereas litter removal decreased it by 26 %. Neither litter addition nor litter removal affected ligninase activity. Changes in cellulase activity correlated positively with SR under both litter addition and litter removal, but no such relationship was found for ligninase activity. These results indicate that changes in litter inputs affect SR primarily by affecting the microbial decomposition of readily decomposable rather than more structurally complex carbon pools. In addition, the effects of changes in litter inputs on cellulase activity decreased with treatment duration, suggesting that the long-term effects of changes in litter inputs on SR might be smaller than previously thought. Our results underscore the dominant role of cellulase in mediating the responses of SR to altered litter inputs. Integrating cellulase responses to altered litter inputs into Earth system models could improve the representation of microbial processes and refine the predictions of soil carbon dynamics.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"367 ","pages":"Article 110503"},"PeriodicalIF":5.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tree-ring width series of synchronously growing trees' classes effectively optimizes their climatic signal","authors":"Jing Yang ,&nbsp;Ouya Fang ,&nbsp;Hengfeng Jia ,&nbsp;Jiacheng Zheng ,&nbsp;Yumei Mu ,&nbsp;Paolo Cherubini","doi":"10.1016/j.agrformet.2025.110500","DOIUrl":"10.1016/j.agrformet.2025.110500","url":null,"abstract":"<div><div>The high variability in forest responses to climate changes is often due to the different ways in which individual trees transmit climate signals. This raises the problem that tree-ring chronologies sometimes lack a strong explanation for climate variations. This study aims to efficiently optimize the climatic signals from tree rings based on the method of classifying trees according to their synchronous growth.</div><div>Following dendroclimatological methods, we obtained tree-ring data from 190 juniper (<em>Juniperus przewalskii</em>) samples in the Qilian Mountains, northeast of the Qinghai-Tibetan Plateau. To explore the growth-climate relationship, we classified trees into high- and low-synchronous groups based on their synchrony of annual radial growth. We found that the tree growth of those two groups has different responses to climate factors.</div><div>The results showed that the chronology of high-synchronous growth was significantly and positively correlated with precipitation and moisture conditions during the early summer, while the chronology of low-synchronous growth was significantly and positively correlated with winter maximum temperatures. Compared with the regional standard chronology, the classified chronologies enhanced the extraction of climate information.</div><div><em>Synthesis.</em> We utilize the growth inconsistency among individual trees to develop a classification method more effectively selects upstream trees, thereby capturing the key climatic signals embedded in tree radial growth. This approach enables a more precise exploration of the relationship between tree-ring growth and climatic factors, with potentially significant implications for improving the accuracy of future climate reconstructions.</div></div>","PeriodicalId":50839,"journal":{"name":"Agricultural and Forest Meteorology","volume":"366 ","pages":"Article 110500"},"PeriodicalIF":5.6,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}