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Variability in the teleconnection between the tropical Pacific and the Indian Ocean and Africa in the 20th to 22nd Centuries.

PI: Gillian Kay
Institution: Oxford University
Additional Investigators: Richard Washington
Abstract:
The Indian Ocean is known to exert influence over rainfall in Africa, and therefore there has been a focus on investigating controls upon Indian Ocean variability, particularly those associated with the El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) activity. Much of the potential predictability of African rainfall has been based on ENSO-related variability. Growing empirical evidence, supported by limited model-based experiments, suggests that the teleconnection between the two ocean basins has not been constant over the course of the 20th Century. Hence, it is important to investigate how the teleconnection may vary under a warming background climate to find if the observed changes can be accounted for by low-frequency internal variability, or whether climate change is likely to play a role in altering the teleconnection.

To carry out this work, we will require the following data:
- radiation components, SAT, SLP, rainfall, cloud cover, OLR;
- at pressure levels 1000mb, 850mb, 700mb, 500mb, 200mb: u, v, q, geopotential height;
- at 500mb: omega
- ocean wind stress, SST
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