| |
| |
|
|
|
|
| |
 |
The Arctic Ocean: Physical Processes and their Effects on Climate and the Ecosystem
|
| |
|
|
Interaction between Arctic Sea Ice and Atlantic-Pacific teleconnection
Wednesday 9th @ 1430-1450, Conference Room 5
Xichen Li* , Institute of Atmospheric Physics
Presenter Email: lixichen@mail.iap.ac.cn |
| Due to its active role in the atmosphere-ocean interactions and in the global climate variability , the surface wind regime over the North Pacific Ocean has been receiving increased attention. To untangle the mechanism and the impacts of these wind changes, we combine observations, reanalysis datasets, and a hierarchy of climate model simulations. Analysis reveals a high pressure anomaly center over the North Pacific, which intensifies the sub-tropical highs and weakens the Aleutian Low. While the altered winds can contribute to the observed sea surface temperature (SST) changes in mid-latitude North Pacific and sea ice distribution around the Bering strait, they are not driven by the regional Pacific SST changes. Instead, the wind changes are mostly caused by remote influences originated from the tropical Atlantic SST changes through stationary Rossby waves. The surface wind changes, represented by a strong anticyclonic circulation anomaly around the Bering strait, changes the sea ice distribution through the thermal advection and the mechanical forcing. On the other hand, sea ice changes over the Arctic also initiate Rossby waves and thus changes the surface wind over the North Pacific. The whole processes forms an air-ocean-sea ice coupling linking the Atlantic, the Arctic, and the Pacific Ocean. |
|
|
|
|
|
|
|
|