DOI: 10.1002/2016GL068481
论文题名: The influence of obliquity in the early Holocene Asian summer monsoon
作者: Wu C.-H. ; Lee S.-Y. ; Chiang J.C.H. ; Hsu H.-H.
刊名: Geophysical Research Letters
ISSN: 0094-9044
EISSN: 1944-8775
出版年: 2016
卷: 43, 期: 9 起始页码: 4524
结束页码: 4530
语种: 英语
英文关键词: Asian summer monsoon
; early Holocene
; obliquity
; perihelion precession
英文摘要: The early Holocene climatic optimum is associated with perihelion precession and high obliquity, though most studies emphasize the former over the latter. Asian monsoon proxy records only decisively show the precessional impact. To explore the obliquity effect, four climate simulations are conducted by fixing orbital parameters of present-day (0K), early Holocene (11K), the lowest obliquity (31K), and 11K's precession and eccentricity with 31K's obliquity (11Kp31Ko). We show that high obliquity significantly augments the precessional impact by shifting the Asian monsoon farther north than present. By contrast, the present-day monsoon seasonality can still be identified in the simulations with low obliquity. We argue that the upper tropospheric (South Asian) and lower tropospheric (North Pacific) high-pressure systems are affected by the subtropical atmospheric heating changes responding to obliquity. As a consequence, associated with the changes in meridional gradients of geopotential height and temperature made by the heating, midlatitude transient eddies and monsoon-midlatitude interactions are modulated. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971012470&doi=10.1002%2f2016GL068481&partnerID=40&md5=71a3eb2ab92531acaf8232ab32b0debb
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10007
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
Recommended Citation:
Wu C.-H.,Lee S.-Y.,Chiang J.C.H.,et al. The influence of obliquity in the early Holocene Asian summer monsoon[J]. Geophysical Research Letters,2016-01-01,43(9).