Consistency of precipitation products over the Arabian Peninsula and interactions with soil moisture and water storage

Youssef Wehbe, Marouane Temimi, Dawit T. Ghebreyesus, Adam Milewski, Hamid Norouzi, Elsy Ibrahim

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

The regional-scale consistency between four precipitation products from the GPCC, TRMM, WM, and CMORPH datasets over the Arabian Peninsula was assessed. Their macroscale relationships were inter-compared with soil moisture and total water storage (TWS) estimates from AMSR-E and GRACE. The consistency analysis was studied with multivariate statistical hypothesis testing and Pearson correlation metrics for the period from January 2000 to December 2010. The products and GRACE estimates were assessed over a representative sub-domain (United Arab Emirates) with available in situ well observations. Next, geographically temporally weighted regression (GTWR) was employed to examine the interdependencies among the peninsula’s hydrological components. The results showed GPCC-TRMM recording the highest correlation (0.85) with insignificant mean differences over more than 90% of the peninsula. The highest GTWR predictive performance of TWS (R2 = 0.84) was achieved with TRMM forcing, which indicates its potential to monitor changes in TWS over the arid peninsular region.

Original languageEnglish
Pages (from-to)408-425
Number of pages18
JournalHydrological Sciences Journal
Volume63
Issue number3
DOIs
StatePublished - 17 Feb 2018

Keywords

  • Arabian Peninsula
  • land surface emissivity
  • rainfall products
  • soil moisture
  • spatial consistency
  • water storage

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