Biases in Sea Surface Temperature and the Annual Cycle of Greater Horn of Africa Rainfall in CMIP6

2021 ◽  
Author(s):  
Bradfield Lyon
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Annual Cycle ◽  
Sea Surface ◽  
Horn Of Africa ◽  
Greater Horn Of Africa

scholarly journals Recent summer precipitation trends in the Greater Horn of Africa and the emerging role of Indian Ocean sea surface temperature

2011 ◽  
Vol 39 (9-10) ◽  
pp. 2307-2328 ◽  
Author(s):  
A. Park Williams ◽  
Chris Funk ◽  
Joel Michaelsen ◽  
Sara A. Rauscher ◽  
Iain Robertson ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Summer Precipitation ◽  
Sea Surface ◽  
Horn Of Africa ◽  
Greater Horn Of Africa ◽  
Precipitation Trends

scholarly journals Coupled Ocean–Atmosphere Interaction and Variability in the Tropical Atlantic Ocean with and without an Annual Cycle

2008 ◽  
Vol 21 (21) ◽  
pp. 5501-5523 ◽  
Author(s):  
Susan C. Bates
Keyword(s):  
Atlantic Ocean ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Annual Cycle ◽  
Sea Surface ◽  
Tropical Atlantic ◽  
Feedback Mechanisms ◽  
Tropical Atlantic Variability ◽  
Ocean Atmosphere ◽  
Mean State

Abstract Many previous studies point to a connection between the annual cycle and interannual variability in the tropical Atlantic Ocean. To investigate the importance of the annual cycle in the generation of tropical Atlantic variability (TAV) as well as its associated coupled feedback mechanisms, a set of controlled experiments is conducted using a global coupled ocean–atmosphere general circulation model (GCM) in which the climatological annual cycle is modified. An anomaly coupling strategy was developed to improve the model-simulated annual cycle and mean sea surface temperature (SST), which is critical to the experiments. Experiments include a control simulation in which the annual cycle is present and a fixed annual cycle simulation in which the coupled model is forced to remain in a perpetual annual mean state. Results reveal that the patterns of TAV, defined as the leading three rotated EOFs, and their relationship to coupled feedback mechanisms are present even in the absence of the annual cycle, suggesting that the generation of TAV is not dependent on the annual cycle. Each pattern of variability arises from an alteration of the easterly trade winds. Results suggest that it is the presence of these winds in the mean state that is the determining factor for the structure of the coupled ocean–atmosphere variability. Additionally, the patterns of variability persist longer in the simulation with no annual cycle. Most remarkable is the doubling of the decay phase related to the north tropical Atlantic variability, which is attributed to the persistence of the local wind–evaporation–sea surface temperature (WES) feedback mechanism. The author concludes that the annual cycle acts to cut off or interrupt conditions favorable for feedback mechanisms to operate, therefore putting a limit on the length of the event life cycle.

scholarly journals Sensitivity of Horn of Africa Rainfall to Regional Sea Surface Temperature Forcing

Climate ◽  
2015 ◽  
Vol 3 (2) ◽  
pp. 365-390 ◽  
Author(s):  
Zewdu Segele ◽  
Lance Leslie ◽  
Aondover Tarhule
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Sea Surface ◽  
Horn Of Africa
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