Abstract
The relative roles of stable and unstable coupled feedbacks in inducing the low frequency SST variability in various regions of the North Atlantic are studied using a coupled general circulation model. The interactive ensemble technique is applied to reduce the strength of "weather noise" in the model and isolate the atmospheric feedback to boundary forcing. We find that the low frequency SST variability in the subtropical North Atlantic is mainly induced by stable coupled feedbacks in which the weather noise plays a central role. However, in the Gulf Stream extension area, the SST variability may be attributed to processes internal to the ocean. Although the results are not definitive, there is no compelling evidence that unstable coupled feedbacks are important for low frequency SST variability in the North Atlantic in this model.
| Original language | English (US) |
|---|---|
| Journal | Geophysical Research Letters |
| Volume | 31 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 16 2004 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Earth and Planetary Sciences (miscellaneous)
Cite this
Causes of low frequency North Atlantic SST variability in a coupled GCM. / Wu, Zhaohua; Schneider, E. K.; Kirtman, Benjamin.
In: Geophysical Research Letters, Vol. 31, No. 9, 16.05.2004.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Causes of low frequency North Atlantic SST variability in a coupled GCM
AU - Wu, Zhaohua
AU - Schneider, E. K.
AU - Kirtman, Benjamin
PY - 2004/5/16
Y1 - 2004/5/16
N2 - The relative roles of stable and unstable coupled feedbacks in inducing the low frequency SST variability in various regions of the North Atlantic are studied using a coupled general circulation model. The interactive ensemble technique is applied to reduce the strength of "weather noise" in the model and isolate the atmospheric feedback to boundary forcing. We find that the low frequency SST variability in the subtropical North Atlantic is mainly induced by stable coupled feedbacks in which the weather noise plays a central role. However, in the Gulf Stream extension area, the SST variability may be attributed to processes internal to the ocean. Although the results are not definitive, there is no compelling evidence that unstable coupled feedbacks are important for low frequency SST variability in the North Atlantic in this model.
AB - The relative roles of stable and unstable coupled feedbacks in inducing the low frequency SST variability in various regions of the North Atlantic are studied using a coupled general circulation model. The interactive ensemble technique is applied to reduce the strength of "weather noise" in the model and isolate the atmospheric feedback to boundary forcing. We find that the low frequency SST variability in the subtropical North Atlantic is mainly induced by stable coupled feedbacks in which the weather noise plays a central role. However, in the Gulf Stream extension area, the SST variability may be attributed to processes internal to the ocean. Although the results are not definitive, there is no compelling evidence that unstable coupled feedbacks are important for low frequency SST variability in the North Atlantic in this model.
UR - http://www.scopus.com/inward/record.url?scp=3543136609&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3543136609&partnerID=8YFLogxK
U2 - 10.1029/2004GL019548
DO - 10.1029/2004GL019548
M3 - Article
VL - 31
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 9
ER -