Integrating multiple satellite observations into a coherent dataset to monitor the full water cycle – application to the Mediterranean region
2018
Abstract. The Mediterranean region is one of the climate hotspots where the climate
change impacts are both pronounced and documented. The HyMeX
(Hydrometeorological Mediterranean eXperiment) aims to improve our
understanding of the water cycle from the meteorological to climate scales.
However, monitoring the water cycle with Earth observations (EO) is still a
challenge: EO products are multiple, and their utility is degraded by large
uncertainties and incoherences among the products. Over the Mediterranean
region, these difficulties are exacerbated by the coastal/mountainous regions
and the small size of the hydrological basins. Therefore, merging/integration
techniques have been developed to reduce these issues. We introduce here an
improved methodology that closes not only the terrestrial but also the
atmospheric and ocean budgets. The new scheme allows us to impose a spatial
and temporal multi-scale budget closure constraint. A new approach is also
proposed to downscale the results from the basin to pixel scales (at the
resolution of 0.25 ∘ ). The provided Mediterranean WC budget is, for
the first time, based mostly on observations such as the GRACE water storage
or the netflow at the Gibraltar Strait. The integrated dataset is in better
agreement with in situ measurements, and we are now able to estimate the
Bosporus Strait annual mean netflow.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
58
References
16
Citations
NaN
KQI