Geophysical Research Letters最新文献_第9页

Investigating the “Too Bright” Issue Pertaining to Non-PBL Clouds Over the South Pacific Trade-Wind Region in CMIP6 Global Climate Models 调查 CMIP6 全球气候模式中与南太平洋贸易风区域上空非 PBL 云有关的 "太亮 "问题

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-16 DOI: 10.1029/2024GL112006

J.-L. F. Li, Kuan-Man Xu, Jonathan H. Jiang, Wei-Liang Lee, Jia-Yuh Yu, Jiun-dar Chern, Gregory V. Cesana, Longtao Wu, Graeme Stephens

{"title":"Investigating the “Too Bright” Issue Pertaining to Non-PBL Clouds Over the South Pacific Trade-Wind Region in CMIP6 Global Climate Models","authors":"J.-L. F. Li, Kuan-Man Xu, Jonathan H. Jiang, Wei-Liang Lee, Jia-Yuh Yu, Jiun-dar Chern, Gregory V. Cesana, Longtao Wu, Graeme Stephens","doi":"10.1029/2024GL112006","DOIUrl":"10.1029/2024GL112006","url":null,"abstract":"This paper examines the “too bright” issue pertaining to non-planetary boundary layer (PBL) clouds over the South Pacific trade-wind region and its potential link to the falling ice radiative effects (FIREs). We run sensitivity experiments with CESM2-CAM6 (CESM2) global climate model with FIREs on (SON) and off (NOS). The model exhibits more in-cloud liquid water content (CLWC) and droplet above the PBL in NOS, leading to larger shortwave (SW) reflectivity at the top of the atmosphere than in SON over the trade wind regions. CMIP6 models are divided into three subsets: separately calculates the radiative effects of cloud ice and falling ice (SON2), combined (SON1) and without falling ice (NOS). SON2 models exhibit improved CLWC and SW reflectivity similar to CESM2-SON, while NOS and SON1 models are akin to CESM2-NOS owing to weaker surface wind stress and warmer ocean surface, caused by the lack of FIREs over the convective zones.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical Conductivity of (Mg, Fe)CO3 at the Spin Crossover and Its Implication for Mid-Mantle Geomagnetic Heterogeneities 自旋交叉点上（镁、铁）CO3 的电导率及其对中幔地磁异质性的影响

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL111046

Chaoshuai Zhao, Jin Liu, Liangxu Xu, Mingqiang Hou, Yukai Zhuang, Jie Zhu, Jung-Fu Lin

{"title":"Electrical Conductivity of (Mg, Fe)CO3 at the Spin Crossover and Its Implication for Mid-Mantle Geomagnetic Heterogeneities","authors":"Chaoshuai Zhao, Jin Liu, Liangxu Xu, Mingqiang Hou, Yukai Zhuang, Jie Zhu, Jung-Fu Lin","doi":"10.1029/2024GL111046","DOIUrl":"10.1029/2024GL111046","url":null,"abstract":"(Mg, Fe)CO3 is an important deep carbon carrier and plays a vital role in our understanding of lower-mantle carbon reservoirs. The electrical conductivity (EC) of FeCO3 was measured at 126−2000 K up to 83 GPa in diamond-anvil cells using a standard four-probe van der Pauw method. Moreover, the EC of FeCO3 increases by ∼6 orders of magnitude from 300 to 1500 K at 10−20 GPa, indicating a strong effect of high temperature. The EC of Fe0.65Mg0.35CO3 was measured up to 60 GPa at 300 K, the EC values of (Mg, Fe)CO3 are proportional to iron content and increase by 2–3 orders of magnitude at 300 K across the spin crossover. The EC values of (Mg, Fe)CO3 and FeCO3 + Fe3O4 ± C mixtures surpass that of bridgmanite, ferropericlase and davemaoite by ∼1–4 orders of magnitude at depths of 800–2,000 km. This result sheds insights into the genesis of local geomagnetic heterogeneities in the mid-lower mantle.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL111046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shallow Lake, Strong Shake: Record of Seismically Triggered Lacustrine Sedimentation From the 1959 M7.3 Hebgen Lake Earthquake Within Henrys Lake, Idaho 浅湖，强震：爱达荷州亨利斯湖内 1959 年 M7.3 级希布根湖地震引发的湖底沉积记录

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL110889

Sylvia R. Nicovich, Christopher B. DuRoss, Jessica A. Thompson Jobe, Jessica R. Rodysill, Richard W. Briggs, Alexandra E. Hatem, Madeleine M. Tan, Yann Gavillot, Noah S. Lindberg, Laura E. Strickland, Jason S. Padgett

{"title":"Shallow Lake, Strong Shake: Record of Seismically Triggered Lacustrine Sedimentation From the 1959 M7.3 Hebgen Lake Earthquake Within Henrys Lake, Idaho","authors":"Sylvia R. Nicovich, Christopher B. DuRoss, Jessica A. Thompson Jobe, Jessica R. Rodysill, Richard W. Briggs, Alexandra E. Hatem, Madeleine M. Tan, Yann Gavillot, Noah S. Lindberg, Laura E. Strickland, Jason S. Padgett","doi":"10.1029/2024GL110889","DOIUrl":"10.1029/2024GL110889","url":null,"abstract":"We investigate a shallow lake basin for evidence of a large historic intraplate earthquake in western North America. Henrys Lake, Idaho is an atypical candidate for lacustrine paleoseismic study given its shallow depth (∼7 m) and low relief (≤2° slopes). Here, we test the earthquake-recording capacity of this basin type by showing sedimentological evidence of the 1959 M7.3 Hebgen Lake earthquake within sediment cores, using anthropogenically produced 137Cs activity to constrain timing. In addition to expanding the morphologic range of basins targeted for lacustrine paleoseismic studies, this work has implications for sediment response in dam-enhanced basins. Lack of sedimentological evidence for other earthquakes coupled with radiocarbon chronology reveals that the 1959 event is the only clearly recorded earthquake within Henrys Lake since the mid-Holocene. Henrys Lake offers a proxy for paleo-earthquake signatures within similar lacustrine environments and underscores the importance of further paleoseismic studies in the region.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110889","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relaxation States of Large Impact Basins on Mercury Based on MESSENGER Data 基于 MESSENGER 数据的水星上大型撞击盆地的弛豫状态

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL110748

Claudia Szczech, Adrien Broquet, Ana-Catalina Plesa, Aymeric Fleury, Michaela Walterová, Alexander Stark, Jürgen Oberst

{"title":"Relaxation States of Large Impact Basins on Mercury Based on MESSENGER Data","authors":"Claudia Szczech, Adrien Broquet, Ana-Catalina Plesa, Aymeric Fleury, Michaela Walterová, Alexander Stark, Jürgen Oberst","doi":"10.1029/2024GL110748","DOIUrl":"10.1029/2024GL110748","url":null,"abstract":"The crustal structure of Mercury's large impact basins provides valuable insights into the planet's geological history. For a warm crust, a post-impact basin structure will viscously relax with inward flow of crustal materials toward the basin center. This effect drastically diminishes the crustal thickness contrasts and associated Bouguer gravity contrasts between the basin center and its surroundings. Here, we analyze Bouguer contrasts of 36 basins (diameter <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>></mo>\u0000 </mrow>\u0000 <annotation> ${ >} $</annotation>\u0000 </semantics></math>300 km) located in the northern hemisphere as a proxy for viscoelastic relaxation. Thermal evolution models, assuming the present 3:2 spin-orbit configuration, are used to predict crustal temperatures. Our analysis reveals that the expected correlation between zones of warm crust and low Bouguer contrast from relaxation is not observed in the available data. This suggests that crustal temperatures have changed in the past, potentially due to a change in Mercury's orbit or to a major volcanic event associated with smooth plain formation.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110748","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Process Evaluation of Subseasonal North Atlantic Oscillation Prediction in the ECMWF Ensemble Forecast System ECMWF 集合预报系统中的亚季北大西洋涛动预测过程评估

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL111291

Minju Kim, Changhyun Yoo, Hyemi Kim

引用次数: 0

Interdecadal Variations in the Spatial Pattern of the Arctic Oscillation Arctic Center in Wintertime 冬季北极涛动北极中心空间模式的年代际变化

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-15 DOI: 10.1029/2024GL111380

Zhou Fang, Xuguang Sun, Xiu-Qun Yang, Zhiwei Zhu

{"title":"Interdecadal Variations in the Spatial Pattern of the Arctic Oscillation Arctic Center in Wintertime","authors":"Zhou Fang, Xuguang Sun, Xiu-Qun Yang, Zhiwei Zhu","doi":"10.1029/2024GL111380","DOIUrl":"10.1029/2024GL111380","url":null,"abstract":"Arctic Oscillation (AO) is the dominant mode of atmospheric circulation in the extratropical Northern Hemisphere regions. The spatial pattern of the AO Arctic center affects the extent of polar cold air outbreaks southward. However, the underlying nature and causes of its interdecadal variation remain unclear. Utilizing ERA5 reanalysis data, this study identifies two distinct spatial patterns of the wintertime AO Arctic center through the K-means clustering method, which alternate over different decade periods. The Double-trough pattern generates a tripolar temperature pattern of “cold Arctic-warm Eurasia-cold Tibetan Plateau” through a Rossby wave train during 1960–1997/2013–2024. While the Single-trough pattern leads to a dipolar temperature pattern in 1998–2012. Furthermore, interdecadal variations in North Atlantic sea surface temperature meridional gradient act as an influencing factor in shaping the spatial pattern of the AO Arctic center. This research aids the understanding and prediction of climate anomalies using AO signals within various decadal contexts.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL111380","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solar Wind Power Likely Governs Uranus' Thermosphere Temperature 太阳风可能控制天王星热层温度

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-14 DOI: 10.1029/2024GL111623

A. Masters, J. R. Szalay, S. Zomerdijk-Russell, M. M. Kao

引用次数: 0

Resolving Uncertainty in the Response of Australia's Terrestrial Carbon Cycle to Projected Climate Change 解决澳大利亚陆地碳循环对预测气候变化响应中的不确定性问题

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-14 DOI: 10.1029/2024GL111398

Lina Teckentrup, Martin G. De Kauwe, Andy J. Pitman, David Wårlind, Anna M. Ukkola, Benjamin Smith

{"title":"Resolving Uncertainty in the Response of Australia's Terrestrial Carbon Cycle to Projected Climate Change","authors":"Lina Teckentrup, Martin G. De Kauwe, Andy J. Pitman, David Wårlind, Anna M. Ukkola, Benjamin Smith","doi":"10.1029/2024GL111398","DOIUrl":"10.1029/2024GL111398","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 Semi-arid ecosystems, common across the Australian continent, strongly influence the inter-annual variability and trend in the global terrestrial net carbon sink. Here we explore the future Australian terrestrial carbon cycle using the CMIP6 ensemble, and the dynamic global vegetation model LPJ-GUESS. Uncertainty in Australia's carbon storage in vegetation ranged between 6 and 49 PgC at the end of the century and was strongly linked to biases in the meteorological forcing. Using LPJ-GUESS with bias-corrected meteorological forcing reduced uncertainty in the vegetation carbon storage to between 14 and 20 PgC, with the remaining range linked to model sensitivities to rising atmospheric CO2 concentration, temperature, and precipitation variability. Reducing this uncertainty will require improved terrestrial biosphere models, but also major improvements in the simulation of regional precipitation by Global Climate Models.\u0000 </section>\u0000 </div>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL111398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142610422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Super Plasma Bubbles During the 7 September 2017 Geomagnetic Storm Revealed by Coupled GITM-SAMI3 Simulations GITM-SAMI3 耦合模拟揭示的 2017 年 9 月 7 日地磁风暴期间超级等离子体气泡的发展情况

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-14 DOI: 10.1029/2024GL112211

Zihan Wang, Shasha Zou, J. D. Huba, Aaron Ridley

引用次数: 0

Influence of Foehn-Like Winds on Near-Surface Temperature at Jang Bogo Station, Terra Nova Bay, East Antarctica 南极洲东部 Terra Nova 湾 Jang Bogo 站的 Foehn-Like 风对近地表温度的影响

IF 4.6 1区地球科学

Geophysical Research Letters Pub Date : 2024-11-14 DOI: 10.1029/2024GL110348

Seohee Ahn, Won-Seok Seo, Hataek Kwon, Min-Hee Lee, Seong-Joong Kim, Bang Yong Lee, Sang-Jong Park, Taejin Choi

{"title":"Influence of Foehn-Like Winds on Near-Surface Temperature at Jang Bogo Station, Terra Nova Bay, East Antarctica","authors":"Seohee Ahn, Won-Seok Seo, Hataek Kwon, Min-Hee Lee, Seong-Joong Kim, Bang Yong Lee, Sang-Jong Park, Taejin Choi","doi":"10.1029/2024GL110348","DOIUrl":"10.1029/2024GL110348","url":null,"abstract":"The coast of Terra Nova Bay (TNB) is known as one of the intense katabatic wind confluence zones in Antarctica. Strong westerly winds with topography-specific foehn effects (foehn-like winds, FLWs) could have influenced surface temperatures in this area downwind of the Transantarctic Mountains, yet their impact remains unstudied. Jang Bogo Station (JBS) in TNB has weak winds year-round, with occasional strong winds causing significant winter temperature increases. This study aims to investigate the FLWs and their recent variability in occurrence at JBS in terms of surface temperature variability. During the strong wind events, the surface warms due to foehn effects such as adiabatic heating and vertical mixing. FLWs occur approximately 16% (10%) of the time in winter (annually). FLWs are caused by cyclones in the eastern Ross Sea. Meteorological records for 2015–2022 revealed an increased FLW frequency, particularly in winter, which has increased temperatures in recent years.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 22","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110348","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142610426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0