DOI: 10.1175/JCLI-D-17-0763.1
Scopus ID: 2-s2.0-85052955517
Title: Comparison of moisture transport between Siberia and Northeast Asia on annual and interannual time scales
Author: Piao J. ; Chen W. ; Zhang Q. ; Hu P.
Source Publication: Journal of Climate
ISSN: 8948755
Publishing Year: 2018
Volume: 31, Issue: 18 pages begin: 7645
pages end: 7660
Language: 英语
Keyword: Annual variations
; Climate variability
; Evaporation
; Interannual variability
; Moisture/moisture budget
; Water vapor
Scopus Keyword: Budget control
; Climate change
; Evaporation
; Evapotranspiration
; Orthogonal functions
; Time measurement
; Water vapor
; Annual variations
; Climate variability
; Empirical Orthogonal Function
; Interannual time scale
; Interannual variability
; Moisture convergence
; Moisture/moisture budgets
; Summer precipitation
; Moisture
English Abstract: The moisture supplies over Siberia and Northeast Asia are investigated by comparing their similarities and differences, enlightened by the seesaw pattern in their summer precipitation. Based on the rotated empirical orthogonal functions in the 3-month standardized precipitation evapotranspiration index (SPEI_03), Siberia and Northeast Asia are defined as the regions within 55°-70°N, 80°-115°E and 40°-55°N, 90°-115°E, respectively. Our results show that over both regions, evaporation contributes the most to the precipitation amount at the annual time scale, and moisture convergence contributes the most on the interannual time scale. For moisture convergence, both the stationary and transient terms are subject to impacts of the midlatitude westerlies. For the annual cycle, the net moisture supply over both Siberia and Northeast Asia is closely associated with both stationary and transient moisture transport. However, on the interannual time scale, the net moisture convergence is closely related to the stationary term only. The examination of the boundary moisture transport shows that in addition to the zonal component, the meridional stationary moisture transport plays a key role in the net moisture convergence. The transient moisture transport mainly depends on moisture transport through the western and southern boundaries, with a comparable magnitude to that of the stationary one, further confirming the importance of the stationary and transient terms on the moisture supply for the annual cycle. In addition, the circulations responsible for moisture transport anomalies indicate that the stationary moisture circulation is the key factor for the moisture supply anomalies over both Siberia and Northeast Asia, with limited impacts from the transient moisture circulation. © 2018 American Meteorological Society. Citation statistics:
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/111394
Appears in Collections: 气候减缓与适应
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Affiliation: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; School of Earth Science, University of the Chinese Academy of Sciences, Beijing, China; Department of Physical Geography, Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
Recommended Citation:
Piao J.,Chen W.,Zhang Q.,et al. Comparison of moisture transport between Siberia and Northeast Asia on annual and interannual time scales[J]. Journal of Climate,2018-01-01,31(18)