Article
Meteorology & Atmospheric Sciences
Yifei Fan, Wei Liu, Pengfei Zhang, Ru Chen, Laifang Li
Summary: Sea surface temperature in the subpolar North Atlantic has significantly decreased from 1900 to 2020, contrary to global warming trends. The cooling, known as the North Atlantic cold blob, may be driven by changes in the atmospheric circulation, particularly a centennial trend towards a more positive phase of the North Atlantic Oscillation (NAO). The NAO intensifies surface winds and causes excessive heat loss from the air-sea interface, cooling the subpolar North Atlantic.
Article
Environmental Sciences
Wen Liang, Yan Wang, Jinglong Mu, Nian Wu, Juying Wang, Sumei Liu
Summary: This study re-examines the nutrient trends in the Bohai Sea and finds that the concentrations of dissolved inorganic nitrogen (DIN) and DIN/dissolved inorganic phosphate (DIP) ratios gradually increased from 2000 to 2013 but dramatically decreased from 2013 to 2019. This suggests that nearshore waters in the Bohai Sea respond more rapidly to changes in human activities. Furthermore, the study demonstrates the phased success of various nutrient reduction measures taken by the Chinese government to improve the environment of the Bohai Sea over the past decade.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Nauman Ali, Qinghua Ye, Xueqin Zhang, Xinhui Ji, Yafan Hu, Liping Zhu, Arslan Ali
Summary: The rapid melting of glaciers in the Himalayas has resulted in severe glacial-hydrological hazards. This study focuses on the Dhauliganga catchment in Uttarakhand, India, and utilizes remote sensing data and geodetic measurements to analyze the changes in glacier area and mass over the past two decades. The results show that the debris-free glacier area has decreased by 12.35%, with a negative mass balance. Some glaciers experienced an increase in melt rate, while others demonstrated a decrease. The collapse of the Ronti glacier is likely attributed to significant mass accumulation. This study is important for understanding glacier changes and predicting disaster risks.
Article
Environmental Sciences
Siyu Meng, Xun Gong, Yang Yu, Xiaohong Yao, Xiang Gong, Keyu Lu, Chao Zhang, Jie Shi, Xiaojie Yu, Huiwang Gao
Summary: The study found that the North Pacific ocean desert has experienced oligotrophication and expansion over the past 20 years, which is related to warming upper oceans in most regions, but the Chl-a variations in the southwest area are linked to regional changes in sea surface heights. Additionally, the insignificant shift in the mean position of NPOD is likely controlled by the Pacific decadal oscillation processes.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Yan Li, Falei Xu, Juan Feng, Mengying Du, Wenjun Song, Chao Li, Wenjing Zhao
Summary: This study reveals the close relationship between the North Atlantic Oscillation (NAO) and dust events (DEs) in North China, and explores the effect and mechanism of NAO on the formation of DEs. The findings show that spring dust aerosols (DAs) in North China exhibit high values and strong interannual variability, which are significantly correlated with the previous winter's NAO. The study also highlights the impact of transient eddy flux transport on dusty weather anomalies influenced by the NAO negative signal in North China, contributing to a better understanding of the formation mechanism of DEs in China.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Multidisciplinary Sciences
Georgina Falster, Bronwen Konecky, Sloan Coats, Samantha Stevenson
Summary: This study reconstructs the variability of the Pacific Walker circulation (PWC) over the past 800 years using proxy data, and finds that recent variability is unusual but not unprecedented. The study also suggests that there is no significant trend in PWC during the industrial era, but there is a subtle anthropogenic influence.
Article
Meteorology & Atmospheric Sciences
Veronika Maslova, Elena Voskresenskaya, Alexander Yurovsky, Mikhail Bardin
Summary: This study analyzed different parameters of winter cyclones in the North Atlantic using NCEP/NCAR reanalysis data, and found that different modes corresponded to the abnormal changes of cyclones in different regions and periods. Spectral analysis identified significant peaks that coincide with key interannual climate signals. Regression analysis identified the teleconnection patterns with the greatest contribution. These findings contribute to a better understanding of the regimes of winter cyclones in the North Atlantic.
THEORETICAL AND APPLIED CLIMATOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Hemant Khatri, Richard G. Williams, Tim Woollings, Doug M. Smith
Summary: Climate model hindcasts reveal the impacts of the North Atlantic Oscillation on the North Atlantic subpolar ocean, showing both fast and slow responses to a single winter NAO event. The fast response occurs over winter-spring seasons and is driven by changes in wind stress and heat flux anomalies, while the slow response persists for 3-4 years and is characterized by the redistribution of surface temperature anomalies.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
So-Yun Kim, Kitack Lee, Tongsup Lee, Ja-Myung Kim, In-Seong Han
Summary: Ocean ventilation plays a crucial role in transporting anthropogenic CO2 from the surface to the interior of the East Sea. This study investigated the connection between ocean ventilation and C-ANTH increase, revealing that changes in East Sea Intermediate Water ventilation were responsible for the periodic decline and recovery in C-ANTH increase.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Ruiqiang Ding, Hyacinth C. Nnamchi, Jin-Yi Yu, Tim Li, Cheng Sun, Jianping Li, Yu-Heng Tseng, Xichen Li, Fei Xie, Juan Feng, Kai Ji, Xumin Li
Summary: The connection between the North Tropical Atlantic (NTA) sea surface temperature (SST) anomalies and El Nino-Southern Oscillation (ENSO) events varies considerably over multidecadal timescales and is mainly controlled by the multidecadal variability of the North Atlantic Oscillation (NAO). During the positive phase of the NAO, the NTA impact on ENSO is amplified due to strengthening of precipitation over the equatorial Atlantic and enhancement of the persistence of NTA SST anomalies.
NATURE COMMUNICATIONS
(2023)
Article
Meteorology & Atmospheric Sciences
Rajat Joshi, Rong Zhang
Summary: Using a high-resolution climate model, it is found that changes in the North Atlantic can impact the upper troposphere/lower stratosphere temperature and vertical motion over the extratropical North Pacific during winter. The warming temperature response in the upper troposphere/lower stratosphere is caused by biases in the North Atlantic cold surface temperature, while the vertical motion response is associated with the North Atlantic induced Walker circulation response over the tropical North Pacific.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Qiang Wang, Lili Zeng, Ju Chen, Yunkai He, Qinyan Liu, Dandan Sui, Dongxiao Wang
Summary: In the past two decades, the winter South China Sea western boundary current has shown a significant phase shift of weak-strong-weak. This phase shift is mainly attributed to the combined effect of wind stress curl and Luzon Strait transport. The phase shifts of the winter monsoon and the Pacific North Equatorial Current bifurcation, which are influenced by the Indian Ocean Dipole Mode and the Atlantic Multidecadal Oscillation respectively, are the major contributors to the phase shift of the winter South China Sea western boundary current.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Civil
Yinuo Zhu, Aizhong Ye, Yuhang Zhang
Summary: This study analyzed the spatiotemporal patterns of water bodies in inland China and quantified the contributions of climate and human activities to their changes. The results showed an overall increase in water body area in inland China, with different regions being affected by different factors.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
John R. Albers, Matthew Newman
Summary: Predicting the North Atlantic Oscillation (NAO) and northern annular mode (NAM) on subseasonal timescales is challenging due to fast and unpredictable weather-related processes dominating their variability. A new linear inverse model (LIM) has been developed to identify key dynamical modes contributing to extended-range NAO skill, showing promise for real-world subseasonal NAO predictions.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Yurong Hou, Nathaniel C. Johnson, Chueh-Hsin Chang, Weijun Sun, Kai Man, Yujie Miao, Xichen Li
Summary: In recent decades, cold winters and springs over mid-latitude North America have been occurring frequently, contrary to the anthropogenic global warming trend. This study investigates the teleconnection between tropical oceans and North America, revealing that an anomalous tropical Atlantic warming can trigger a cold spring over central-western mid-latitude North America. The mechanisms revealed in this study have important implications for the predictability of cold springs over North America and various sectors such as agriculture, power supply, and public health.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Tianfei Xue, Ivy Frenger, Andreas Oschlies, Charles A. Stock, Wolfgang Koeve, Jasmin G. John, A. E. Friederike Prowe
Summary: The Humboldt Upwelling System is globally important for fisheries, but the origin of its high productivity is still unclear. Research using simulations and analyses shows a seasonal trophic amplification driven by a varying trophic transfer efficiency due to mixed layer variations. These findings highlight the significance of mixed layer depth for seasonal trophodynamics.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
William J. Jenkins, Scott C. Doney, Alan M. Seltzer, Christopher R. German, Dempsey E. E. Lott III, Kevin L. Cahill
Summary: By comparing the noble gas signatures of deep waters from the North Atlantic and Pacific Ocean, it is found that the sea level pressure around Antarctica has decreased over the past two millennia, resulting in the addition of glacial melt water to form deep water. The vertical profiles of noble gases in the deep Pacific show exponential relationships with depth, and helium isotopes indicate the injection of non-atmospheric helium at mid-depth. The isotope ratio of this injected helium decreases from south to north, likely due to various factors including seafloor spreading, radiogenic helium release from increased sediment thickness, and emission of radiogenic helium through cold seeps along the Alaskan and North American margins.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Environmental Sciences
Jay Fuhrman, Candelaria Bergero, Maridee Weber, Seth Monteith, Frances M. Wang, Andres F. Clarens, Scott C. Doney, William Shobe, Haewon McJeon
Summary: Carbon dioxide removal (CDR) is a critical tool in limiting global warming, and a diverse set of CDR approaches have important benefits and costs for energy-water-land systems. An integrated assessment model was used to evaluate various CDR approaches, including bioenergy with carbon capture and storage, afforestation, direct air capture with carbon storage, enhanced weathering, biochar, and direct ocean capture with carbon storage. These approaches have different levels of carbon removal, deployment, and impacts across regions, with a global removal capacity of approximately 10 GtCO(2) yr(-1). A diverse portfolio of CO2 removal strategies can achieve gigatonne-scale removals while limiting risks to the water-energy-land system.
NATURE CLIMATE CHANGE
(2023)
Article
Microbiology
Heather H. Kim, Charlotte Laufkoetter, Tomas Lovato, Scott C. Doney, Hugh W. Ducklow
Summary: By utilizing a three-dimensional coupled ocean biogeochemical model, this study investigates the responses of bacteria to climate change. It assesses the credibility of century-scale projections of bacterial carbon stock and rates in the upper 100 m layer using skill scores and measurements for the contemporary period. The results show that bacterial biomass trends are sensitive to regional trends in temperature and organic carbon stocks under different climate scenarios.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Environmental Sciences
Annie Bourbonnais, Bonnie X. X. Chang, Rolf E. Sonnerup, Scott C. Doney, Mark A. Altabet
Summary: This study conducted research on the concentration, stable isotopic composition, and isotopomer of nitrous oxide in the Pacific region using data collected from the Global Ocean Ship-based Hydrographic Investigations Program. The study found that the production of nitrous oxide significantly increased under low oxygen conditions near the oxygen-deficient zone.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Ecology
Alexander J. Smith, Karen McGlathery, Yaping Chen, Carolyn J. Ewers Lewis, Scott C. Doney, Keryn Gedan, Carly K. LaRoche, Peter Berg, Michael L. Pace, Julie C. Zinnert, Matthew L. Kirwan
Summary: Coastal landscapes consist of shifting mosaics of distinct ecosystems, and rapid losses and gains within these ecosystems largely offset each other, resulting in relatively stable areas and increased carbon storage. However, the strength of these compensatory mechanisms may weaken as climate change exacerbates carbon losses.
Article
Environmental Sciences
Chloe Fauvel, Jay Fuhrman, Yang Ou, William Shobe, Scott Doney, Haewon McJeon, Andres Clarens
Summary: Net-zero greenhouse gas emission targets are crucial for stabilizing global climate, and carbon dioxide removal (CDR) is a key strategy. CDR can be achieved through nature-based or engineered approaches, but its deployment will have significant regional impacts. Using modeling, we analyzed how regional resources will influence and be influenced by CDR deployment in the United States. Our findings indicate that CDR will be extensively but unevenly deployed across the country, with certain states having the potential to become net exporters of negative emissions. However, resource reallocation and increased water and fertilizer use will be necessary.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Tim Devries, Kana Yamamoto, Rik Wanninkhof, Nicolas Gruber, Judith Hauck, Jens Daniel Mueller, Laurent Bopp, Dustin Carroll, Brendan Carter, Thi-Tuyet-Trang Chau, Scott C. Doney, Marion Gehlen, Lucas Gloege, Luke Gregor, Stephanie Henson, Ji Hyun Kim, Yosuke Iida, Tatiana Ilyina, Peter Landschuetzer, Corinne Le Quere, David Munro, Cara Nissen, Lavinia Patara, Fiz F. Perez, Laure Resplandy, Keith B. Rodgers, Joerg Schwinger, Roland Seferian, Valentina Sicardi, Jens Terhaar, Joaquin Trinanes, Hiroyuki Tsujino, Andrew Watson, Sayaka Yasunaka, Jiye Zeng
Summary: This contribution analyzes the processes that determine the global ocean carbon sink and its trends and variability over the period 1985-2018 using models and observation-based products. The study finds that anthropogenic CO2 dominates the ocean CO2 sink, while climate-driven variability is potentially large but highly uncertain.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Geography, Physical
Benjamin T. Saenz, Darren C. Mckee, Scott C. Doney, Douglas G. Martinson, Sharon E. Stammerjohn
Summary: Processes driving changes in sea-ice seasonality and thickness in the warm-shelf region of the West Antarctic Peninsula were investigated using simulations and observations. The study found that both surface and subsurface thermodynamic and dynamic processes play important roles in sea-ice variability. The results also highlighted the mechanism in which a shoaling pycnocline enhances upward deep-water heat fluxes.
JOURNAL OF GLACIOLOGY
(2023)
Article
Multidisciplinary Sciences
Qinyi Li, Daphne Meidan, Peter Hess, Juan A. Anel, Carlos A. Cuevas, Scott Doney, Rafael P. Fernandez, Maarten van Herpen, Lena Hoeglund-Isaksson, Matthew S. Johnson, Douglas E. Kinnison, Jean-Francois Lamarque, Thomas Roeckmann, Natalie M. Mahowald, Alfonso Saiz-Lopez
Summary: This study evaluates the potential environmental impacts of increasing reactive chlorine emissions as a climate mitigation strategy to reduce methane levels. The results show that significant changes occur in other important climate forcers, such as tropospheric ozone. The quantity and method of adding chlorine, as well as its interactions with climate pathways, must be carefully considered.
NATURE COMMUNICATIONS
(2023)
Article
Astronomy & Astrophysics
Sarah E. Lang, Kelly M. A. Luis, Scott C. Doney, Olivia Cronin-Golomb, Max C. N. Castorani
Summary: Understanding and attributing changes to water clarity is crucial for studying and managing coastal ecosystems. However, variability in space and time limits the ability to describe patterns of water clarity. Regional satellite algorithms can provide a more comprehensive understanding of these changes.
EARTH AND SPACE SCIENCE
(2023)
Article
Environmental Sciences
Yifan Guan, Gretchen Keppel-Aleks, Scott C. Doney, Christof Petri, Dave Pollard, Debra Wunch, Frank Hase, Hirofumi Ohyama, Isamu Morino, Justus Notholt, Kei Shiomi, Kim Strong, Rigel Kivi, Matthias Buschmann, Nicholas Deutscher, Paul Wennberg, Ralf Sussmann, Voltaire A. Velazco, Yao Te
Summary: Atmospheric carbon dioxide (CO2) accumulation and its interannual variations (IAVs) are critical for understanding carbon-climate feedbacks. The Orbiting Carbon Observatory-2 (OCO-2) satellite offers an opportunity to study CO2 IAV with better spatial coverage compared to traditional monitoring techniques. This study analyzes OCO-2 data and finds that there are significant IAVs of CO2, which are related to climatic variations such as El Nino-Southern Oscillation (ENSO).
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Environmental
Wade E. Fritzeen, Patrick R. O'Rourke, Jay G. Fuhrman, Lisa M. Colosi, Sha Yu, William M. Shobe, Scott C. Doney, Haewon C. McJeon, Andres F. Clarens
Summary: The chemical industry contributes significantly to CO2 emissions, but the implementation of emerging decarbonization strategies and processes can lead to substantial reductions. However, achieving net-zero emissions is dependent on the global deployment of carbon capture and storage (CCS), as well as alternative feedstocks and proper waste treatment of plastics.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Judith Hauck, Luke Gregor, Cara Nissen, Lavinia Patara, Mark Hague, Precious Mongwe, Seth Bushinsky, Scott C. Doney, Nicolas Gruber, Corinne Le Quere, Manfredi Manizza, Matthew Mazloff, Pedro M. S. Monteiro, Jens Terhaar
Summary: Based on data from the RECCAP2 project, we assessed the CO2 uptake in the Southern Ocean and found that it is only half of what was previously estimated. Furthermore, there is a knowledge gap in understanding the increase in CO2 sink since 2000. It is important to improve our observation and understanding of the drivers of the carbon cycle in order to accurately assess the Southern Ocean's role in CO2 absorption.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Geosciences, Multidisciplinary
Zhibo Shao, Yangchun Xu, Hua Wang, Weicheng Luo, Lice Wang, Yuhong Huang, Nona Sheila R. Agawin, Ayaz Ahmed, Mar Benavides, Mikkel Bentzon-Tilia, Ilana Berman-Frank, Hugo Berthelot, Isabelle C. Biegala, Mariana B. Bif, Antonio Bode, Sophie Bonnet, Deborah A. Bronk, Mark V. Brown, Lisa Campbell, Douglas G. Capone, Edward J. Carpenter, Nicolas Cassar, Bonnie X. Chang, Dreux Chappell, Yuh-ling Lee Chen, Matthew J. Church, Francisco M. Cornejo-Castillo, Amalia Maria Sacilotto Detoni, Scott C. Doney, Cecile Dupouy, Marta Estrada, Camila Fernandez, Bieito Fernandez-Castro, Debany Fonseca-Batista, Rachel A. Foster, Ken Furuya, Nicole Garcia, Kanji Goto, Jesus Gago, Mary R. Gradoville, M. Robert Hamersley, Britt A. Henke, Cora Horstmann, Amal Jayakumar, Zhibing Jiang, Shuh-Ji Kao, David M. Karl, Leila R. Kittu, Angela N. Knapp, Sanjeev Kumar, Julie LaRoche, Hongbin Liu, Jiaxing Liu, Caroline Lory, Carolin R. Loscher, Emilio Maranon, Lauren F. Messer, Matthew M. Mills, Wiebke Mohr, Pia H. Moisander, Claire Mahaffey, Robert Moore, Beatriz Mourino-Carballido, Margaret R. Mulholland, Shin-ichiro Nakaoka, Joseph A. Needoba, Eric J. Raes, Eyal Rahav, Teodoro Ramirez-Cardenas, Christian Furbo Reeder, Lasse Riemann, Virginie Riou, Julie C. Robidart, Vedula V. S. S. Sarma, Takuya Sato, Himanshu Saxena, Corday Selden, Justin R. Seymour, Dalin Shi, Takuhei Shiozaki, Arvind Singh, Rachel E. Sipler, Jun Sun, Koji Suzuki, Kazutaka Takahashi, Yehui Tan, Weiyi Tang, Jean-Eric Tremblay, Kendra Turk-Kubo, Zuozhu Wen, Angelicque E. White, Samuel T. Wilson, Takashi Yoshida, Jonathan P. Zehr, Run Zhang, Yao Zhang, Ya-Wei Luo
Summary: This study presents an updated version (version 2) of the global oceanic diazotroph database, which significantly increases the number of in situ diazotrophic measurements and provides more detailed insights into nitrogen fixation in the global ocean. Version 2 yields significantly higher estimates of nitrogen fixation rates compared to version 1, particularly in the South Pacific and North Atlantic regions. Furthermore, additional data sheets for non-cyanobacterial diazotrophs and cell-specific N2 fixation rates have been included in version 2, enhancing the database's comprehensiveness.
EARTH SYSTEM SCIENCE DATA
(2023)