FN Archimer Export Format PT J TI North Atlantic and Pacific Quasi‐Stationary Parts of Atmospheric Rivers and Their Implications for East Asian Monsoon Onset BT AF Lee, Hung‐I Mitchell, Jonathan L. Tripati, Aradhna Lora, Juan M. Chen, Ge Ding, Qinghua AS 1:1;2:1,2;3:1,2,3,4,8;4:2,5;5:1;6:6,7; FF 1:;2:;3:;4:;5:;6:; C1 Department of Atmospheric and Oceanic Sciences, University of California Los Angeles CA, USA Department of Earth, Planetary, and Space Sciences, University of California Los Angeles CA ,USA Institute of the Environment and Sustainability, University of California Los Angeles C,A USA European Institute of Marine Sciences (IUEM) Universit de Brest, UMR 6538, Domaines Océaniques, Rue Dumont D'Urville, and IFREMER Plouzane ,France Department of Geology and Geophysics, Yale University New Haven CT ,USA Department of Geography, University of California Santa Barbara CA,USA Earth Research Institute, University of California Santa Barbara CA, USA European Institute of Marine Sciences (IUEM) Universit de Brest, UMR 6538, Domaines Océaniques, Rue Dumont D'Urville, and IFREMER Plouzane ,France C2 UNIV CALIF LOS ANGELES, USA UNIV CALIF LOS ANGELES, USA UNIV CALIF LOS ANGELES, USA UBO, FRANCE UNIV YALE, USA UNIV CALIF SANTA BARBARA, USA UNIV CALIF SANTA BARBARA, USA IFREMER, FRANCE SI BREST SE PDG-REM-GM-LCG UM LGO IN WOS Ifremer UPR copubli-france copubli-univ-france copubli-int-hors-europe IF 4.497 TC 2 UR https://archimer.ifremer.fr/doc/00592/70439/68539.pdf https://archimer.ifremer.fr/doc/00592/70439/68540.pdf LA English DT Article DE ;atmospheric rivers;monsoon;Rossby wave breaking AB Using a global space‐time diagram of column water vapor (CWV) at 30° N latitude from daily reanalysis data, we find two quasi‐stationary parts of atmospheric rivers (QSARs) that feature locally enhanced CWV and evolve from the Eastern Pacific/Atlantic basins in the winter to the Western Pacific/Atlantic in the summer. East Asian Summer Monsoon onset coincides with the time CWV in the Pacific QSAR first exceeds 40 mm, which also typically occurs just before it makes landfall. QSARs exist in 39‐year (1979–2017) daily climatological CWV, demonstrating the seasonal cycles of these features are quasi‐stationary and potentially useful for monsoon onset prediction. East Asian Summer Monsoon onset is particularly predictable following El Niño‐Southern Oscillation, consistently occurring 25–40 days after the QSAR crosses the dateline. Analysis of local wave activity reveals QSARs as fronts of wave breakings, thus opening a new window into dynamics of subtropical monsoon extensions. PY 2019 PD NOV SO Geophysical Research Letters SN 0094-8276 PU American Geophysical Union (AGU) VL 46 IS 21 UT 000494357000001 BP 12311 EP 12320 DI 10.1029/2019GL084272 ID 70439 ER EF