DOI: 10.1016/j.quascirev.2015.06.008
Scopus记录号: 2-s2.0-84922755567
论文题名: Precession and obliquity forcing of the freshwater budget over the Mediterranean
作者: Bosmans J.H.C. ; Drijfhout S.S. ; Tuenter E. ; Hilgen F.J. ; Lourens L.J. ; Rohling E.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 123 起始页码: 16
结束页码: 30
语种: 英语
英文关键词: Freshwater
; Mediterranean
; Orbital forcing (precession, obliquity)
; Paleoclimate modelling
Scopus关键词: Atmospheric thermodynamics
; Climate models
; Earth (planet)
; Incident solar radiation
; Orbits
; Runoff
; Solar radiation
; Surface waters
; Water
; Air-sea temperature difference
; Convective precipitation
; Coupled climate model
; Freshwater
; Insolation seasonality
; Mediterranean
; Orbital forcing
; Paleoclimate modelling
; Budget control
; climate modeling
; convection
; freshwater
; insolation
; mixed layer
; obliquity
; orbital forcing
; paleoclimate
; precession
; precipitation (climatology)
; runoff
; sea surface salinity
; seasonality
; temperature gradient
; water budget
; Mediterranean Sea
; North Africa
英文摘要: There is strong proxy and model evidence of precession- and obliquity-induced changes in the freshwater budget over the Mediterranean Sea and its borderlands, yet explanations for these changes vary greatly. We investigate the separate precession and obliquity forcing of the freshwater budget over the Mediterranean using a high-resolution coupled climate model, EC-Earth. At times of enhanced insolation seasonality, i.e. minimum precession and maximum obliquity, the area was wetter and the Mediterranean Sea surface was less saline. The latter has been attributed to increased runoff from the south as a consequence of a strengthened North African monsoon, as well as to increased precipitation over the Mediterranean Sea itself. Our results show that both mechanisms play a role in changing the freshwater budget. Increased monsoon runoff occurs in summer during times of enhanced insolation seasonality, especially minimum precession, while increased precipitation is important in winter for both precession and obliquity. We relate changes in winter precipitation to changes in the air-sea temperature difference and subsequently, convective precipitation. The freshening in the minimum precession and maximum obliquity experiments has a strong effect on Mediterranean sea surface salinity and mixed layer depth, thereby likely influencing deep sea circulation and sedimentation at the ocean bottom. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59871
Appears in Collections: 过去全球变化的重建
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作者单位: Utrecht University, Faculty of Geosciences, Department of Earth Sciences, Budapestlaan 4, Utrecht, Netherlands; Royal Netherlands Meteorological Institute, Postbus 201, De Bilt, Netherlands; The Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia; University of Southampton, Ocean and Earth Sciences, Waterfront Campus (NOCS), European Way, Southampton, United Kingdom
Recommended Citation:
Bosmans J.H.C.,Drijfhout S.S.,Tuenter E.,et al. Precession and obliquity forcing of the freshwater budget over the Mediterranean[J]. Quaternary Science Reviews,2015-01-01,123