DOI: 10.1175/JCLI-D-13-00149.1
Scopus记录号: 2-s2.0-84890185681
论文题名: How oceanic oscillation drives soil moisture variations over mainland Australia: An analysis of 32 years of satellite observations*
作者: Bauer-Marschallinger B. ; Dorigo W.A. ; Wagner W. ; Van Dijk A.I.J.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 24 起始页码: 10159
结束页码: 10173
语种: 英语
Scopus关键词: Atmospheric oscillations
; Australia
; Complex empirical orthogonal functions
; Indian ocean dipoles
; Oceanic variabilities
; Remotely sensed surface soil moistures
; Satellite observations
; Southern Annular Mode
; Atmospheric pressure
; Hydrology
; Remote sensing
; Signal processing
; Soil moisture
; Soil surveys
; Climatology
; El Nino-Southern Oscillation
; hydrology
; remote sensing
; satellite data
; seasonal variation
; soil moisture
; Australia
英文摘要: Australia is frequently subject to droughts and floods. Its hydrology is strongly connected to oceanic and atmospheric oscillations (climate modes) such as the El Niño-Southern Oscillation (ENSO), Indian Ocean dipole (IOD), and southern annular mode (SAM). A global 32-yr dataset of remotely sensed surface soil moisture (SSM) was used to examine hydrological variations in mainland Australia for the period 1978-2010. Complex empirical orthogonal function (CEOF) analysis was applied to extract independent signals and to investigate their relationships to climate modes. The annual cycle signal represented 46.3% of the total variance and a low but highly significant connection with SAM was found. Two multiannual signals with a lesser share in total variance (6.3%and 4.2%) were identified. The first one had an unstable period of 2-5 yr and reflected an east-west pattern that can be associated with ENSO and SAMbut not with IOD. The second one, a 1-to 5-yr oscillation, formed a dipole pattern between the west and north and can be linked to ENSO and IOD. As expected, relationships with ENSO were found throughout the year and are especially strong during southern spring and summer in the east and north. Somewhat unexpectedly, SAM impacts strongest in the north and east during summer and is proposed as the key driver of the annual SSM signal. The IOD explains SSMvariations in the north, east, and southeast during spring and also in the west during winter. © 2013 American Meteorological Society. 资助项目: ESA, European Space Agency
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51477
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Vienna University of Technology, Vienna, Australia; Fenner School of Environment and Society, Australian National University, ACT, Australia
Recommended Citation:
Bauer-Marschallinger B.,Dorigo W.A.,Wagner W.,et al. How oceanic oscillation drives soil moisture variations over mainland Australia: An analysis of 32 years of satellite observations*[J]. Journal of Climate,2013-01-01,26(24)