English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Response of the eastern subtropical Atlantic SST to Saharan dust: A modeling and observational study

Avellaneda, N. M., Serra, N., Minnett, P. J., & Stammer, D. (2010). Response of the eastern subtropical Atlantic SST to Saharan dust: A modeling and observational study. Journal of Geophysical Research: Oceans, 115: C08015. doi:10.1029/2009JC005692.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Avellaneda, N. Martinez1, Author
Serra, N.1, Author
Minnett, P. J.1, Author
Stammer, D.2, 3, Author           
Affiliations:
1external, ou_persistent22              
2Max Planck Fellows, MPI for Meteorology, Max Planck Society, ou_913548              
3A 3 - Climate Sensitivity and Sea Level, Research Area A: Climate Dynamics and Variability, The CliSAP Cluster of Excellence, External Organizations, Bundesstraße 53, 20146 Hamburg, DE, ou_1863480              

Content

show
hide
Free keywords: SEA-SURFACE TEMPERATURE; TROPICAL NORTH-ATLANTIC; AEROSOL OPTICAL-THICKNESS; SOUTHERN-OCEAN; DESERT DUST; IN-SITU; CLIMATE; IMPACT; VALIDATION; RADIOMETER
 Abstract: Retrievals of aerosol optical depth (AOD) from MODIS, and of sea surface temperature (SST) from TMI are analyzed jointly with the output of a numerical model for the period 2000-2006 to determine the impact of Saharan dust on the eastern subtropical North Atlantic SST. Simultaneously with, or shortly after strong dust outbreaks, a decrease in SST of 0.2 degrees to 0.4 degrees C can be observed in the microwave SST data set, which is consistent with an independent estimate of SST decrease simulated here by a local mixed layer model. However, low wind conditions and a shallow mixed layer are required to reach this response, and it is therefore unlikely that a clear response of SST to dust lasting more than a few days can be seen in the microwave SST observations. An inspection of microwave SST observations suggests that about 30% of SST variance could be explained by dust-induced cooling in our study region that is not represented in existing AVHRR SST fields nor represented in reanalysis centers-provided surface heat fluxes. On longer time scales, a comparison between observed SST fields and simulated SST, using an eddy-permitting model of the North Atlantic, suggests a cooling of about 0.5 degrees C on the local SST on sub-seasonal to interannual time scales which is significantly correlated and consistent with a dust-induced cooling. However, while supportive of the hypothesis that Saharan dust lead to a reduction in SST, the eddy-resolving model results are not by themselves conclusive. Moreover, the effects of dust-induced cooling on simulations of the ocean circulation, on atmospheric forecasts and on climate simulations remains to be investigated in future studies.

Details

show
hide
Language(s): eng - English
 Dates: 20102010-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000280957400001
DOI: 10.1029/2009JC005692
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Geophysical Research: Oceans
  Other : JGR
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Hoboken, NJ : Wiley
Pages: - Volume / Issue: 115 Sequence Number: C08015 Start / End Page: - Identifier: Other: 2169-9291
CoNE: https://pure.mpg.de/cone/journals/resource/2169-9291