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Medientyp:
E-Artikel
Titel:
Contrasting Phase Changes of Precipitation Annual Cycle Between Land and Ocean Under Global Warming
Beteiligte:
Song, Fengfei;
Lu, Jian;
Leung, L. Ruby;
Liu, Fukai
Erschienen:
American Geophysical Union (AGU), 2020
Erschienen in:
Geophysical Research Letters, 47 (2020) 20
Sprache:
Englisch
DOI:
10.1029/2020gl090327
ISSN:
0094-8276;
1944-8007
Entstehung:
Anmerkungen:
Beschreibung:
AbstractWe report a land‐ocean contrast in the phase change of precipitation annual cycle in multimodel ensemble simulations as climate warms, with a robust delay over land (0–40°N/S) versus an advance (0–40°N/S) or no clear (0–25°N/S) phase changes over ocean. The robust delay over land is caused by the increased effective atmospheric heat capacity CA. Over ocean, the increased CA favors a phase delay, while the land‐ocean precipitation contrast during the peak rainy season favors a phase advance. The latter overwhelms the former and causes a seasonal advance over 0–40°N/S, while the two factors cancel out and result in no phase changes over 0–25°N/S. Under the atmospheric energetic constraint, the land‐ocean precipitation contrast in the peak rainy season is related to their opposite amplitude changes of surface temperature annual cycle: Seasonally different wind changes enhance the amplitude over ocean, while increased CA and surface cooling feedback reduce the amplitude over land.