Article
Meteorology & Atmospheric Sciences
Baoyan Zhu, Bo Sun, Huijun Wang
Summary: The study reveals that since the early 1990s, the interannual variability of extreme high-temperature events during summer over eastern China has shown a dipole mode, which is associated with air-sea interaction over the western tropical Pacific and North Atlantic.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Yidi Song, Haishan Chen
Summary: This study reveals the mechanisms underlying the interannual variability of spring land surface temperature over western Eurasia. The positive phase of North Atlantic tripole sea surface temperature anomalies in February can affect the circulation patterns and lead to local surface warming over western Eurasia in spring.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Weiming Ma, Gang Chen
Summary: The interannual variability of winter atmospheric river activities over the Northern Hemisphere is investigated, with a focus on the leading modes of variability in the North Pacific and North Atlantic. The study identifies dipole and tripole structures in the Pacific, and equatorward shift and strengthening of ARs in the Atlantic. The role of sea surface temperature forcing versus internal atmospheric variability is then quantified using a large ensemble of climate models, with results showing higher predictability for Pacific AR variability.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Rosa Vellosa Lyngwa, Waqar Ul Hassan, Munir Ahmad Nayak, Mohd Farooq Azam
Summary: This study investigates the impacts of atmospheric rivers on the hydrology of two highly populated basins in the Himalayas. The results show that atmospheric rivers contribute significantly to precipitation, snowfall, and floods in the region. They account for more than 50% of winter precipitation and explain a significant portion of interannual variability. The occurrence of catastrophic flood events is also linked to category 5 atmospheric rivers.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Jindong Jiang, Jiuxin Shi, Fei Huang
Summary: By analyzing the interannual variability of the subduction rate of Indian Ocean Subtropical Mode Water (IOSTMW), it was found that there are significant fluctuations in the southwestern part of the southern Indian Ocean subtropical circulation, with a quasi-biennial period dominating the variations. The depth of the wintertime mixed layer plays a key role in the subduction rate changes, while vertical pumping has a relatively small contribution.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Shuai Hu, Bo Wu, Tianjun Zhou, Yongqiang Yu
Summary: The interannual variability of Tibetan Plateau summer climate has significant impacts on both regional hydrological cycles and global climate. This study identifies four dominant modes of summertime large-scale circulation over the Tibetan Plateau and surrounding areas. These modes are associated with ENSO-forced, ENSO-independent, summer North Atlantic Oscillation, and circumglobal teleconnection patterns.
JOURNAL OF CLIMATE
(2022)
Article
Oceanography
Hiromichi Ueno, Masato Oda, Katsura Yasui, Ryo Dobashi, Humio Mitsudera
Summary: The distribution and interannual variation of the winter halocline in the upper layers of the World Ocean were found to be closely related to sea surface salinity, with strong haloclines occurring in areas of low salinity.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Meteorology & Atmospheric Sciences
Ruidan Chen, Zhiping Wen, Riyu Lu, Wenjun Liu
Summary: This study uncovers the changes in interannual variability of summer temperature over Northeast Asia, showing a strengthening after the early 1990s and a reduction after the mid-2000s, which are influenced by Pacific-Japan (PJ) teleconnection and southeastern tropical Indian Ocean (SETIO). The weakened atmospheric processes before the early 1990s lead to reduced variability in Northeast Asia temperature, with weak influence of PJ teleconnection and reduced variability of SETIO SST after the mid-2000s.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Ge Song, Bohua Huang, Rongcai Ren, Zeng-Zhen Hu
Summary: In this article, the interannual variability of upper-ocean temperature in the equatorial Indian Ocean is explored using 58 years of comprehensive monthly mean ocean reanalysis data. Three dominant modes of variability are identified, including an intrinsic oscillation and a nonlinear long-term trend in the upper-ocean temperature. These findings highlight the importance of understanding the dynamics of the equatorial Indian Ocean for predicting and studying climate variability.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Chiyu Zhao, Xin Geng, Wenjun Zhang, Li Qi
Summary: This study finds that the Atlantic multidecadal oscillation (AMO) can affect the El Nino-Southern Oscillation (ENSO). It shows that during a negative AMO phase, the atmospheric anomaly amplitudes in the tropical Pacific for El Nino events are more pronounced and for La Nina events are weaker, compared to a positive AMO phase. This discrepancy may be largely attributed to the decadal modulation of AMO.
JOURNAL OF CLIMATE
(2022)
Article
Meteorology & Atmospheric Sciences
Helene Asbjornsen, Helen L. Johnson, Marius Arthun
Summary: The study shows that the inflow across the Iceland-Scotland Ridge impacts the heat supply to the Nordic seas from the subpolar North Atlantic and influences marine ecosystems and sea ice extent further north. The inflow primarily originates from the subtropics and the Arctic, with its properties and volume transport being affected by atmospheric circulation anomalies and shifts in ocean currents. Gyre dynamics and wind forcing play a crucial role in determining the inflow properties and volume transport in the Nordic seas.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
T. O. N. G. Lu, Z. H. I. W. E. I. Zhu, Y. I. N. G. Yang, J. I. N. G. Ma, G. A. N. G. Huang
Summary: This study investigates the formation mechanism of the summer Western North Pacific Anomalous Anticyclone (WNPAC) that is independent of El Niño-Southern Oscillation (ENSO). It is found that besides the significant relationship with ENSO, the WNPAC index remains almost unchanged after removing the impact of ENSO, suggesting the possibility of other origins of the WNPAC. A two-step mechanism from the Atlantic to the Pacific is proposed for the formation of ENSO-independent summer WNPAC.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Ingo Richter, Hiroki Tokinaga, Yu Kosaka, Takeshi Doi, Takahito Kataoka
Summary: The tropical Atlantic has a weak influence on ENSO development, mainly acting to modulate ongoing events rather than initiate them.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Xianke Yang, Ping Huang, Peng Hu, Zhibiao Wang
Summary: This study defines two indices for continuing and emerging ENSOs based on the combination of the two leading modes of tropical sea surface temperature anomalies. It reveals that these two types of ENSOs dominate the variability in the tropical Indo-western Pacific and have different impacts on the Asian summer monsoon.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Leishan Jiang, Tim Li, Yoo-Geun Ham
Summary: Despite a weak linear relation between the equatorial Atlantic sea surface temperature anomaly (EA SSTA) and preceding winter El Nino-Southern Oscillation (ENSO), an EA warming event is typically preceded by either an El Nino or La Nina phase. The physical mechanisms behind this asymmetric impact were investigated through observations and modeling analyses. El Nino-induced EA warming is caused by El Nino-related SSTA in the South Atlantic, while La Nina-induced EA warming is driven by westerly anomalies during the decaying spring. The asymmetric response in the South Atlantic is attributed to the differential heating strength over the central Pacific and Maritime Continent. The distinct evolutions of El Nino and La Nina also contribute to the asymmetric EA response. The study suggests that the South Atlantic SSTA and ENSO temporal evolution play crucial roles in explaining the asymmetric impacts of El Nino and La Nina on EA warming.
JOURNAL OF CLIMATE
(2023)
Article
Oceanography
Roberta C. Hamme, Johanna E. Berry, Jody M. Klymak, Kenneth L. Denman
CONTINENTAL SHELF RESEARCH
(2015)
Article
Geosciences, Multidisciplinary
Roberta C. Hamme, Steven R. Emerson, Jeffrey P. Severinghaus, Matthew C. Long, Igor Yashayaev
GEOPHYSICAL RESEARCH LETTERS
(2017)
Article
Environmental Sciences
Lianna Teeter, Roberta C. Hamme, Debby Ianson, Laura Bianucci
GLOBAL BIOGEOCHEMICAL CYCLES
(2018)
Article
Environmental Sciences
Mitchell K. Wolf, Roberta C. Hamme, Denis Gilbert, Igor Yashayaev, Virginie Thierry
GLOBAL BIOGEOCHEMICAL CYCLES
(2018)
Article
Environmental Sciences
Jeremy Krogh, Debby Ianson, Roberta C. Hamme, Christopher J. Lowe
MARINE POLLUTION BULLETIN
(2018)
Article
Geosciences, Multidisciplinary
Roberta C. Hamme, Peter W. Webley, William R. Crawford, Frank A. Whitney, Michael D. DeGrandpre, Steven R. Emerson, Charles C. Eriksen, Karina E. Giesbrecht, Jim F. R. Gower, Maria T. Kavanaugh, M. Angelica Pena, Christopher L. Sabine, Sonia D. Batten, Laurence A. Coogan, Damian S. Grundle, Deirdre Lockwood
GEOPHYSICAL RESEARCH LETTERS
(2010)
Article
Geosciences, Multidisciplinary
Roberta C. Hamme, Steven R. Emerson
GEOPHYSICAL RESEARCH LETTERS
(2013)
Article
Environmental Sciences
Karina E. Giesbrecht, Roberta C. Hamme, Steven R. Emerson
GLOBAL BIOGEOCHEMICAL CYCLES
(2012)
Article
Oceanography
Roberta C. Hamme, Nicolas Cassar, Veronica P. Lance, Robert D. Vaillancourt, Michael L. Bender, Peter G. Strutton, Tommy S. Moore, Michael D. DeGrandpre, Christopher L. Sabine, David T. Ho, Bruce R. Hargreaves
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2012)
Review
Geochemistry & Geophysics
Roberta C. Hamme, David P. Nicholson, William J. Jenkins, Steven R. Emerson
ANNUAL REVIEW OF MARINE SCIENCE, VOL 11
(2019)
Article
Oceanography
Jennifer L. Reeve, Roberta C. Hamme, William J. Williams
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2019)
Article
Environmental Sciences
Amanda H. V. Timmerman, Roberta C. Hamme
Summary: Consistent trends between in situ and in vitro methods were observed in estimating gross primary production rates, while significant differences were found in estimating carbon export due to the release of dissolved organic matter not accounted for in the in vitro method. Factors such as upwelling of low-O2 water and the interaction between bloom dynamics and integration time of methods were identified as causes of outliers in the study results.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Ana C. Franco, Debby Ianson, Tetjana Ross, Roberta C. Hamme, Adam H. Monahan, James R. Christian, Marty Davelaar, William K. Johnson, Lisa A. Miller, Marie Robert, Philippe D. Tortell
Summary: The study reveals that the trends in the carbon system of the northeast subarctic Pacific are mainly driven by anthropogenic CO2 uptake, leading to increases in surface DIC, decreases in pH, and reductions in aragonite saturation state, partially offset by changes in surface salinity or temperature. Additionally, long-term decreases in ventilation in the western Pacific have contributed to the increased remineralization and DIC trends in the subsurface waters.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Oceanography
Roberta C. Hamme, Jeffrey P. Severinghaus
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2007)