Inter-Relationships Between Groundnut Yield in Senegal, Interannual Rainfall Variability and Sea-Surface Temperatures |
| |
| Authors: | P Camberlin M Diop |
| |
| Institution: | (1) Centre de Recherches de Climatologie, CNRS ESA 5080 “Climatologie de l’Espace Tropical”, Université de Bourgogne, Dijon, France, FR |
| |
| Abstract: | Summary Groundnut production strongly contributes to Senegal’s economy. Interannual variations of groundnut yield for the country
as a whole, and their relationship with rainfall amounts, are examined for the 31-yr period 1960–1990. It is shown that on
that scale, and after removing decadal trends, almost half of the variance is explained by rainfall variability, especially
that of the early part of the rainy season (July–August). Given the high spatial coherence of seasonal rainfall in the region,
teleconnections with global- and regional-scale climate dynamics, including sea-surface temperatures, are assessed. Though
some features are similar to the rest of the Sahel, others are more specific, such as the higher sensitivity to ENSO (El-Ni?o
Southern Oscillation) and to coupled ocean-atmosphere climate anomalies over the nearby Tropical North Atlantic Ocean, which
are associated to the latitudinal location of the ITCZ over the ocean. Lag-correlations with pre-season SST are also discussed.
Some of these teleconnections are used to define preliminary empirical models for rainfall and groundnut yield prediction
for Senegal.
Received March 23, 1998 Revised January 11, 1999 |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
