IF 30.7 1区地球科学

Nature Climate Change Pub Date : 2024-10-21 DOI: 10.1038/s41558-024-02149-1

Chae Yeon Park, Kiyoshi Takahashi, Shinichiro Fujimori, Thanapat Jansakoo, Chantelle Burton, Huilin Huang, Sian Kou-Giesbrecht, Christopher P. O. Reyer, Matthias Mengel, Eleanor Burke, Fang Li, Stijn Hantson, Junya Takakura, Dong Kun Lee, Tomoko Hasegawa

{"title":"Attributing human mortality from fire PM2.5 to climate change","authors":"Chae Yeon Park, Kiyoshi Takahashi, Shinichiro Fujimori, Thanapat Jansakoo, Chantelle Burton, Huilin Huang, Sian Kou-Giesbrecht, Christopher P. O. Reyer, Matthias Mengel, Eleanor Burke, Fang Li, Stijn Hantson, Junya Takakura, Dong Kun Lee, Tomoko Hasegawa","doi":"10.1038/s41558-024-02149-1","DOIUrl":"https://doi.org/10.1038/s41558-024-02149-1","url":null,"abstract":"<p>Climate change intensifies fire smoke, emitting hazardous air pollutants that impact human health. However, the global influence of climate change on fire-induced health impacts remains unquantified. Here we used three well-tested fire–vegetation models in combination with a chemical transport model and health risk assessment framework to attribute global human mortality from fire fine particulate matter (PM<sub>2.5</sub>) emissions to climate change. Of the 46,401 (1960s) to 98,748 (2010s) annual fire PM<sub>2.5</sub> mortalities, 669 (1.2%, 1960s) to 12,566 (12.8%, 2010s) were attributed to climate change. The most substantial influence of climate change on fire mortality occurred in South America, Australia and Europe, coinciding with decreased relative humidity and in boreal forests with increased air temperature. Increasing relative humidity lowered fire mortality in other regions, such as South Asia. Our study highlights the role of climate change in fire mortality, aiding public health authorities in spatial targeting adaptation measures for sensitive fire-prone areas.</p>","PeriodicalId":18974,"journal":{"name":"Nature Climate Change","volume":null,"pages":null},"PeriodicalIF":30.7,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452000","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}

引用次数: 0

Direct and lagged climate change effects intensified the 2022 European drought 气候变化的直接和滞后影响加剧了 2022 年欧洲干旱

IF 18.3 1区地球科学

Nature Geoscience Pub Date : 2024-10-21 DOI: 10.1038/s41561-024-01559-2

Emanuele Bevacqua, Oldrich Rakovec, Dominik L. Schumacher, Rohini Kumar, Stephan Thober, Luis Samaniego, Sonia I. Seneviratne, Jakob Zscheischler

{"title":"Direct and lagged climate change effects intensified the 2022 European drought","authors":"Emanuele Bevacqua, Oldrich Rakovec, Dominik L. Schumacher, Rohini Kumar, Stephan Thober, Luis Samaniego, Sonia I. Seneviratne, Jakob Zscheischler","doi":"10.1038/s41561-024-01559-2","DOIUrl":"https://doi.org/10.1038/s41561-024-01559-2","url":null,"abstract":"<p>In 2022, Europe faced an extensive summer drought with severe socioeconomic consequences. Quantifying the influence of human-induced climate change on such an extreme event can help prepare for future droughts. Here, by combining observations and climate model outputs with hydrological and land-surface simulations, we show that Central and Southern Europe experienced the highest observed total water storage deficit since satellite observations began in 2002, probably representing the highest and most widespread soil moisture deficit in the past six decades. While precipitation deficits primarily drove the soil moisture drought, human-induced global warming contributed to over 30% of the drought intensity and its spatial extent via enhanced evaporation. We identify that 14–41% of the climate change contribution was mediated by the warming-driven drying of the soil that occurred before the hydrological year of 2022, indicating the importance of considering lagged climate change effects to avoid underestimating associated risks. Human-induced climate change had qualitatively similar effects on the extremely low observed river discharges. These results highlight that global warming effects on droughts are already underway, widespread and long lasting, and that drought risk may escalate with further human-induced warming in the future.</p>","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":null,"pages":null},"PeriodicalIF":18.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451827","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}

引用次数: 0

Using Extensive Core-Reflected Phases to Constrain Sharp Inner Core Boundary Beneath East Asia 利用广泛的地心反射相位来确定东亚地下的锐利内核边界

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2024-10-21 DOI: 10.1029/2024jb028698

Haodong Zhang, Tianyu Cui, Yinshuang Ai

{"title":"Using Extensive Core-Reflected Phases to Constrain Sharp Inner Core Boundary Beneath East Asia","authors":"Haodong Zhang, Tianyu Cui, Yinshuang Ai","doi":"10.1029/2024jb028698","DOIUrl":"https://doi.org/10.1029/2024jb028698","url":null,"abstract":"The physical properties of the Earth's inner core boundary (ICB) are crucial for understanding inner core growth and geodynamo generation. In this study, we analyze the differential travel time residuals (DTTRs) and waveform similarities of the core-reflected phases (PKiKP and PcP) to investigate fine-scale seismic structures of the ICB. To study the ICB beneath East Asia, we collect a total of 4,272 PKiKP and PcP phase pairs from 37 earthquakes occurring from January 2009 to December 2018 recorded by permanent stations in the Chinese Digital Seismic Network (CDSN). This extensive PKiKP dataset allows for a geographically continuous depiction of the ICB beneath East Asia, revealing a diverse scope on its topography and sharpness. There are three main findings in our study. First, we collect a comprehensive PKiKP and PcP dataset with extensive ray coverage across East Asia. Numerous weak precritical PKiKP signals are detected, enabling robust constraints on the ICB across wide regions. Second, the PKiKP-PcP DTTRs exhibit an average offset of −0.25 s (ranging from −1.5 to 1.0 s) relative to the PREM model, suggesting the outer core is approximately 1.3 km thinner than predicted by the PREM model, although it remains largely consistent with it. Third, the bin-stacked PKiKP and PcP waveforms show high similarity across most sampled areas, indicating that the ICB thickness is no more than 2 km mostly beneath East Asia, which aligns with the hypothesis of a rapid transition from the solid inner core to the liquid outer core in our study region.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global burned area increasingly explained by climate change 全球烧毁面积越来越多地归因于气候变化

IF 30.7 1区地球科学

Nature Climate Change Pub Date : 2024-10-21 DOI: 10.1038/s41558-024-02140-w

Chantelle Burton, Seppe Lampe, Douglas I. Kelley, Wim Thiery, Stijn Hantson, Nikos Christidis, Lukas Gudmundsson, Matthew Forrest, Eleanor Burke, Jinfeng Chang, Huilin Huang, Akihiko Ito, Sian Kou-Giesbrecht, Gitta Lasslop, Wei Li, Lars Nieradzik, Fang Li, Yang Chen, James Randerson, Christopher P. O. Reyer, Matthias Mengel

{"title":"Global burned area increasingly explained by climate change","authors":"Chantelle Burton, Seppe Lampe, Douglas I. Kelley, Wim Thiery, Stijn Hantson, Nikos Christidis, Lukas Gudmundsson, Matthew Forrest, Eleanor Burke, Jinfeng Chang, Huilin Huang, Akihiko Ito, Sian Kou-Giesbrecht, Gitta Lasslop, Wei Li, Lars Nieradzik, Fang Li, Yang Chen, James Randerson, Christopher P. O. Reyer, Matthias Mengel","doi":"10.1038/s41558-024-02140-w","DOIUrl":"https://doi.org/10.1038/s41558-024-02140-w","url":null,"abstract":"<p>Fire behaviour is changing in many regions worldwide. However, nonlinear interactions between fire weather, fuel, land use, management and ignitions have impeded formal attribution of global burned area changes. Here, we demonstrate that climate change increasingly explains regional burned area patterns, using an ensemble of global fire models. The simulations show that climate change increased global burned area by 15.8% (95% confidence interval (CI) [13.1–18.7]) for 2003–2019 and increased the probability of experiencing months with above-average global burned area by 22% (95% CI [18–26]). In contrast, other human forcings contributed to lowering burned area by 19.1% (95% CI [21.9–15.8]) over the same period. Moreover, the contribution of climate change to burned area increased by 0.22% (95% CI [0.22–0.24]) per year globally, with the largest increase in central Australia. Our results highlight the importance of immediate, drastic and sustained GHG emission reductions along with landscape and fire management strategies to stabilize fire impacts on lives, livelihoods and ecosystems.</p>","PeriodicalId":18974,"journal":{"name":"Nature Climate Change","volume":null,"pages":null},"PeriodicalIF":30.7,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452001","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}

引用次数: 0

The impact of North American winter weather regimes on electricity load in the central United States 北美冬季天气状况对美国中部电力负荷的影响

IF 9 1区地球科学

npj Climate and Atmospheric Science Pub Date : 2024-10-21 DOI: 10.1038/s41612-024-00803-1

Oliver T. Millin, Jason C. Furtado, Christopher Malloy

引用次数: 0

Constructing Long-Term Hydrographs for River Climate-Resilience: A Novel Approach for Studying Centennial to Millennial River Behavior 构建河流气候适应性长期水文图：研究百年至千年河流行为的新方法

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-21 DOI: 10.1029/2024wr037666

Mohamed M. Fathi, Virginia Smith, Ayman G. Awadallah, Anjali M. Fernandes, Michael T. Hren, Dennis O. Terry

{"title":"Constructing Long-Term Hydrographs for River Climate-Resilience: A Novel Approach for Studying Centennial to Millennial River Behavior","authors":"Mohamed M. Fathi, Virginia Smith, Ayman G. Awadallah, Anjali M. Fernandes, Michael T. Hren, Dennis O. Terry","doi":"10.1029/2024wr037666","DOIUrl":"https://doi.org/10.1029/2024wr037666","url":null,"abstract":"Studying the centennial or millennial timescale response of large rivers to changing patterns in precipitation, discharge, flood intensity and recurrence, and associated sediment erosion is critical for understanding long-term fluvial geomorphic adjustment to climate. Long hydrographs, maintaining reliable Flow Duration Curves (FDCs), are a fundamental input for such simulations; however, recorded discharge series rarely span more than a few decades. The absence of robust methodologies for generating representative long-term hydrographs, especially those incorporating coarse temporal resolution or lacking continuous simulations, is therefore a fundamental challenge for climate resilience. We present a novel approach for constructing multi-century hydrographs that successfully conserve the statistical, especially frequency analysis, and stochastic characteristics of observed hydrographs. This approach integrates a powerful combination of a weather generator with a fine disaggregation technique and a continuous rainfall-runoff transformation model. We tested our approach to generate a statistically representative 300-year hydrograph on the Ninnescah River Basin in Kansas, using a satellite precipitation data set to address the considerable gaps in the available hourly observed data sets. This approach emphasizes the similarities of FDCs between the observed and generated hydrographs, exhibiting a reasonably acceptable range of average absolute deviation between 6% and 18%. We extended this methodology to create projected high-resolution hydrographs based on a range of climate change scenarios. The projected outcomes present pronounced increases in the FDCs compared to the current condition, especially for more distant futures, which necessitates more efficient adaptation strategies. This approach represents a paradigm shift in long-term hydrologic modeling.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":null,"pages":null},"PeriodicalIF":5.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451918","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}

引用次数: 0

The role of the Messinian evaporites in the identification of potential gas storage sites: A review of the Adriatic foreland basin system (Italy) 梅西尼亚蒸发岩在确定潜在天然气储存地方面的作用：亚得里亚海前陆盆地系统（意大利）回顾

IF 3.2 2区地球科学

Basin Research Pub Date : 2024-10-21 DOI: 10.1111/bre.70000

V. Manzi, D. Bigi, S. Lugli, F. Balsamo, N. Chizzini, A. Lucca, F. Storti

{"title":"The role of the Messinian evaporites in the identification of potential gas storage sites: A review of the Adriatic foreland basin system (Italy)","authors":"V. Manzi, D. Bigi, S. Lugli, F. Balsamo, N. Chizzini, A. Lucca, F. Storti","doi":"10.1111/bre.70000","DOIUrl":"https://doi.org/10.1111/bre.70000","url":null,"abstract":"Focusing on the late Miocene succession stratigraphic successions including the evaporite deposits from the Messinian salinity crisis (MSC) of the Adriatic foreland basin, a revision of available boreholes and seismic data allowed us to recognize the presence of reservoirs and seals systems that can be considered of potential interest for the storage of natural and synthetic gas. Potentially good reservoir sites can be found where porous rocks referable to siliciclastic turbiditites (Marnoso-arenacea and Laga Fms) or shallow-water carbonates (Bolognano Fm) preferentially involved in anticlinal structures and covered by thick MSC evaporites, which may represent effective reservoir seals. The integrated reconstruction of porous rocks distribution and facies, thickness, and lateral continuity of the overlying evaporites, allows the identification and zonation of geological settings in the Adriatic foredeep, backbulge and foreland with peculiar stratigraphy and deformations, only partially considered before, that may deserve consideration in the research of potential gas storage sites.","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geological conditions and fluid flow history that lead to the development of large clastic dykes in basins: A case study from Kushiro, Japan 导致盆地中大型碎屑岩堤发育的地质条件和流体流动历史：日本钏路的案例研究

IF 3.2 2区地球科学

Basin Research Pub Date : 2024-10-21 DOI: 10.1111/bre.70002

Shuji Tamamura, Takuma Murakami, Katsuhiko Kaneko, Tetsuro Yoneda, Tsutomu Sato, Jun Aizawa, Hiroyuki Matsumoto, Kagemi Uchida, Yoshiaki Suzuki, Toshifumi Igarashi

{"title":"Geological conditions and fluid flow history that lead to the development of large clastic dykes in basins: A case study from Kushiro, Japan","authors":"Shuji Tamamura, Takuma Murakami, Katsuhiko Kaneko, Tetsuro Yoneda, Tsutomu Sato, Jun Aizawa, Hiroyuki Matsumoto, Kagemi Uchida, Yoshiaki Suzuki, Toshifumi Igarashi","doi":"10.1111/bre.70002","DOIUrl":"https://doi.org/10.1111/bre.70002","url":null,"abstract":"Large clastic dykes (the Harutori-Taro and Harutori-Jiro dykes) and smaller dykes are exposed in the underground Kushiro Coal Mine (KCM), Japan. This study examines these dykes as a case study to investigate the geological conditions and fluid flow history that lead to the development of large clastic dykes in basins. The composition of the dykes indicates the Beppo and/or Harutori formations as their parent unit. Crystallite size distribution (CSD) analysis reveals Ostwald ripening of the kaolinite in the kaolinitised feldspar from the dykes, suggesting stagnant conditions in the parent unit before the dyke was formed. In contrast, smectite CSDs and the high carbonate content of the dykes suggest that large volumes of fluid flowed through the dykes along the established hydraulic gradient, which was triggered by the breaking of the upper seal. The isotopic and chemical compositions of the calcite and aragonite in the dykes, with moderate siderite and rhodochrosite content, indicate the fluid was a warm (>30°C) mixture of freshwater and saltwater, which was transferred from deeper levels of the parent unit towards the crest of an anticline. Immediately after sand injection, the semi-closed system of the parent unit near the root of the large dyke was transformed into a major flow channel for overpressurised fluids. Subsequently, a large volume of fluid flowed along the vertical conduit (or dyke) over a long period of time (>1 Myr), which removed fluid from a widespread area (i.e., several hundred square kilometres) of the basin. The results show that thin parent units, poor lateral continuity of the upper seal, and spatially heterogeneous overpressurisation do not preclude the formation of large dykes.","PeriodicalId":8712,"journal":{"name":"Basin Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Age of Stratospheric Air: Progress on Processes, Observations, and Long-Term Trends 平流层空气的年龄：过程、观测和长期趋势方面的进展

IF 25.2 1区地球科学

Reviews of Geophysics Pub Date : 2024-10-21 DOI: 10.1029/2023rg000832

H. Garny, F. Ploeger, M. Abalos, H. Bönisch, A. E. Castillo, T. von Clarmann, M. Diallo, A. Engel, J. C. Laube, M. Linz, J. L. Neu, A. Podglajen, E. Ray, L. Rivoire, L. N. Saunders, G. Stiller, F. Voet, T. Wagenhäuser, K. A. Walker

{"title":"Age of Stratospheric Air: Progress on Processes, Observations, and Long-Term Trends","authors":"H. Garny, F. Ploeger, M. Abalos, H. Bönisch, A. E. Castillo, T. von Clarmann, M. Diallo, A. Engel, J. C. Laube, M. Linz, J. L. Neu, A. Podglajen, E. Ray, L. Rivoire, L. N. Saunders, G. Stiller, F. Voet, T. Wagenhäuser, K. A. Walker","doi":"10.1029/2023rg000832","DOIUrl":"https://doi.org/10.1029/2023rg000832","url":null,"abstract":"Age of stratospheric air is a well established metric for the stratospheric transport circulation. Rooted in a robust theoretical framework, this approach offers the benefit of being deducible from observations of trace gases. Given potential climate-induced changes, observational constraints on stratospheric circulation are crucial. In the past two decades, scientific progress has been made in three main areas: (a) Enhanced process understanding and the development of process diagnostics led to better quantification of individual transport processes from observations and to a better understanding of model deficits. (b) The global age of air climatology is now well constrained by observations thanks to improved quality and quantity of data, including global satellite data, and through improved and consistent age calculation methods. (c) It is well established and understood that global models predict a decrease in age, that is, an accelerating stratospheric circulation, in response to forcing by greenhouse gases and ozone depleting substances. Observational records now confirm long-term forced trends in mean age in the lower stratosphere. However, in the mid-stratosphere, uncertainties in observational records are too large to confirm or disprove the model predictions. Continuous monitoring of stratospheric trace gases and further improved methods to derive age from those tracers will be crucial to better constrain variability and long-term trends from observations. Future work on mean age as a metric for stratospheric transport will be important due to its potential to enhance the understanding of stratospheric composition changes, address climate model biases, and assess the impacts of proposed climate geoengineering methods.","PeriodicalId":21177,"journal":{"name":"Reviews of Geophysics","volume":null,"pages":null},"PeriodicalIF":25.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451944","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}

引用次数: 0

Seasonal Variability in Baffin Bay 巴芬湾的季节变化

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2024-10-21 DOI: 10.1029/2024JC021038

Xuan Shan, Michael A. Spall, Clark Pennelly, Paul G. Myers

{"title":"Seasonal Variability in Baffin Bay","authors":"Xuan Shan, Michael A. Spall, Clark Pennelly, Paul G. Myers","doi":"10.1029/2024JC021038","DOIUrl":"https://doi.org/10.1029/2024JC021038","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Three dominant characteristics and underlying dynamics of the seasonal cycle in Baffin Bay are discussed. The study is based on a regional, high-resolution coupled sea ice-ocean numerical model that complements our understanding drawn from observations. Subject to forcing from the atmosphere, sea ice, Greenland, and other ocean basins, the ocean circulation exhibits complex seasonal variations that influence Arctic freshwater storage and export. The basin-scale barotropic circulation is generally stronger (weaker) in summer (winter). The interior recirculation (∼2 Sv) is primarily driven by oscillating along-topography surface stress. The volume transport along the Baffin Island coast is also influenced by Arctic inflows (∼0.6 Sv) via Smith Sound and Lancaster Sound with maximum (minimum) in June-August (October-December). In addition to the barotropic variation, the Baffin Island Current also has changing vertical structure with the upper-ocean baroclinicity weakened in winter-spring. It is due to a cross-shelf circulation associated with spatially variable ice-ocean stresses that flattens isopycnals. Greenland runoff and sea ice processes dominate buoyancy forcing to Baffin Bay. Opposite to the runoff that freshens the west Greenland shelf, stronger salinification by ice formation compared to freshening by ice melt enables a net densification in the interior of Baffin Bay. Net sea ice formation in the past 30 years contributes to ∼25% of sea ice export via Davis Strait. The seasonal variability in baroclinicity and water mass transformation changes in recent decades based on the simulation.</p>\u0000 </section>\u0000 </div>","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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