TY - JOUR
T1 - Corals Reveal an Unprecedented Decrease of Arabian Sea Upwelling During the Current Warming Era
AU - Watanabe, Takaaki K.
AU - Watanabe, Tsuyoshi
AU - Pfeiffer, Miriam
AU - Hu, Hsun Ming
AU - Shen, Chuan Chou
AU - Yamazaki, Atsuko
N1 - Funding Information:
The authors acknowledge K. Ohmori for his help with fieldwork in the Sultanate of Oman. H. Nomura and K. Nakamura helped to slice the fossil corals. T. Tajima assisted with scanning electron microscopy observations and X‐ray diffraction analysis. The authors acknowledge T. Irino for managing MAT253 and Kiel‐IV. T.‐L.Yu organized U‐Th lab at National Taiwan University. This work was supported by JSPS KAKENHI Grant Number JP25257207. U‐Th dating was supported was supported by grants from the Science Vanguard Research Program of the Ministry of Science and Technology (MOST) (109‐2123‐M‐002‐001 to C.‐C. Shen), the National Taiwan University (109L8926 to C.‐C. Shen), the Higher Education Sprout Project of the Ministry of Education, Taiwan ROC (109L901001 to C.‐C. Shen). All authors declare that they have no competing interest.
Publisher Copyright:
© 2021. American Geophysical Union. All Rights Reserved.
PY - 2021/5/28
Y1 - 2021/5/28
N2 - Upwelling in the Arabian Sea driven by the Indian summer monsoon pumps deep, cold, and eutrophic seawater to the sea surface every summer. The Indian summer monsoon and the Arabian Sea upwelling were expected to intensify with global warming, following the hypothesis that the Eurasian landmass would warm faster than the Indian Ocean. Contrary to expectations, the northern Indian Ocean currently warms faster than the Indian subcontinent. A weakening of the Indian summer monsoon circulation is reported, which possibly weakens the Arabian Sea upwelling. However, a lack of observations limits understanding of current and historical changes of the Arabian Sea upwelling. Here, we reconstruct the Arabian Sea upwelling over the past millennium using modern and fossil corals. Our coral records show that the Arabian Sea upwelling intensity was very stable over the last millennium and unprecedentedly declines at present. Our finding implies anthropogenic forcing likely weakens the Arabian Sea upwelling.
AB - Upwelling in the Arabian Sea driven by the Indian summer monsoon pumps deep, cold, and eutrophic seawater to the sea surface every summer. The Indian summer monsoon and the Arabian Sea upwelling were expected to intensify with global warming, following the hypothesis that the Eurasian landmass would warm faster than the Indian Ocean. Contrary to expectations, the northern Indian Ocean currently warms faster than the Indian subcontinent. A weakening of the Indian summer monsoon circulation is reported, which possibly weakens the Arabian Sea upwelling. However, a lack of observations limits understanding of current and historical changes of the Arabian Sea upwelling. Here, we reconstruct the Arabian Sea upwelling over the past millennium using modern and fossil corals. Our coral records show that the Arabian Sea upwelling intensity was very stable over the last millennium and unprecedentedly declines at present. Our finding implies anthropogenic forcing likely weakens the Arabian Sea upwelling.
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U2 - 10.1029/2021GL092432
DO - 10.1029/2021GL092432
M3 - Article
AN - SCOPUS:85106877041
VL - 48
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 10
M1 - e2021GL092432
ER -