Search results for "hydrological cycle"
showing 3 items of 3 documents
Pesticide contamination in water and sediment of the aquatic systems of the Natural Park of the Albufera of Valencia (Spain) during the rice cultivat…
2021
The Natural Park of the Albufera (Valencia, Spain) is a Mediterranean wetland where rice cultivation dominates the agricultural activity. The purpose of this study was to offer broader information about the current state of the wetland assessing the contamination by pesticides in four aquatic habitats during the rice cultivation period in 2016. Liquid chromatography with tandem mass spectrometer (UHPLC-MS/MS) was used to determine the pesticides in water and sediment samples from the rice fields, Lake Albufera and irrigation and outlet channels. 21 pesticides were detected in our samples (seven already forbidden by European legislation). Higher values than 10000 ng L of accumulated pesticid…
Assessment of water budgets from NWP model analyses and reanalyses over West Africa
2010
International audience; Water budgets from ECMWF reanalysis ERA-Interim and NCEP reanalysis I and II are inter-compared and compared to GPS precipitable water and to a 6-yr so-called "hybrid" budget dataset composed of ALMIP (AMMA Land surface Model Intercomparison Project) offline simulations forced with TRMM precipitation data. Deficiencies are evidenced in the reanalyses which are the most pronounced over the Sahel. Results from operational models (ECMWF-IFS, NCEP-GFS, and ARPEGE-Tropiques) and the special ECMWF AMMA reanalysis confirm and help understand these findings. A bias (~1-2 mm day-1) in precipitation and evapotranspiration leads to an unrealistic view of West Africa as a moistu…
Lagrangian matches between observations from aircraft, lidar and radar in a warm conveyor belt crossing orography
2021
Warm conveyor belts (WCBs) are important airstreams in extratropical cyclones, often leading to the formation of intense precipitation and the amplification of upper-level ridges. This study presents a case study that involves aircraft, lidar and radar observations in a WCB ascending from western Europe towards the Baltic Sea during the Hydrological Cycle in the Mediterranean Experiment (HyMeX) and T-NAWDEX-Falcon in October 2012, a preparatory campaign for the THORPEX North Atlantic Waveguide and Downstream Impact Experiment (TNAWDEX). Trajectories were used to link different observations along the WCB, that is, to establish so-called Lagrangian matches between observations. To this aim, a…