A Sudden Change In Rainfall Characteristics In Amman, Jordan During The Mid 1950s
Mahmoud M. Smadi and Ahmed Zghoul
DOI : 10.3844/ajessp.2006.84.91
American Journal of Environmental Sciences
Volume 2, Issue 3
This study examines recent changes, trends and fluctuations in the total rainfall and number of rainy days at Amman Airport Meteorological (AAM) station in Jordan during the period 1922-2003. The occurrence of abrupt changes and trends were examined and identified using the Pettitt test, a combination of cumulative sum charts (CUSUM) and bootstrapping and the sequential version of Mann-Kendall rank tests. A sudden change and shift in the average of the total rainfall and annual number of rain days occurred in 1957. Annual total rainfall series from Madaba and Mafraq stations are also analyzed and showed similar change and shift points as that which appeared in AAM station. The analysis prevail a decline in the total rainfall and number of rain days in the second half of the past centaury.
© 2006 Mahmoud M. Smadi and Ahmed Zghoul. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.