There is growing recognition that a synergistic integration of data, knowledge, and methods from a variety of water-allied disciplines is needed to study, engineer for, or manage water resources. This integrated approach is necessary if we are to consider all components of the water cycle and their complex interactions with ecological, biogeochemical and human systems at a watershed-scale. The ...

[1] In this paper, we investigate floods and droughts in the Upper Mississippi basin over a 50-year period (1950–1999) using a hydrological model (Variable Infiltration Capacity Model – 3 Layer). Simulations have been carried out between January 1950 and December 1999 at daily timestep and 1/8 spatial resolution for the water budget and at hourly time-step and 1 spatial resolution for the energ...

The discrepancy between central Greenland borehole temperatures and the isotopic composition of Last Glacial Maximum ice can be explained by a shift in the •5180-T relationship for the hydrological cycle linked to cooler tropical temperatures. This concept is illustrated using a simple Rayleigh distillation model. An estimate for o•=A•5180/AT (LGM-Holocene) of-0.37 %o/øC is determined with a si...

Interactions between humans and the environment are occurring on a scale that has never previously been seen; the scale of human interaction with the water cycle, along with the coupling present between social and hydrological systems, means that decisions that impact water also impact people. Models are often used to assist in decision-making regarding hydrological systems, and so in order for...

All over the Earth, more and studies have shown effects of climate changes generated by anthropic release greenhouse gasses on hydrological cycle [...]

We investigate the reasons for the opposite climate change signals in precipitation between the regional climate model REMO and its driving earth system model MPI-ESM over the greater Congo region. Three REMO simulations following three RCP scenarios (RCP 2.6, RCP 4.5 and RCP 8.5) are conducted, and it is found that the opposite signals, with REMO showing a decrease and MPI-ESM an increase in t...

The efficient operation of water resources is one of the major challenges in modern society. One of the main characteristics of the hydrological cycle corresponds to its temporal variability, expressed as fluctuations in the precipitation regime as well as modifications in the rates of evapotranspiration as a result of changes in atmospheric conditions. A better knowledge of the relationships b...

A wide range of hydrological cycles and general circulations was simulated with an idealized general circulation model (GCM) by varying the optical thickness of the longwave absorber. While the idealized GCM does not capture the full complexity of the hydrological cycle, the wide range of climates simulated allows the systematic development and testing of theories of how precipitation and moist...

655 Fresh water is under pressure in the humid tropics from population growth, land use and climate change, all of which are influenced by humans. These pressures are likely to have profound consequences. Here we present a research vision for the humid tropics as an outcome of a community workshop held in Hawaii in March 2011. This report includes various perspectives from the international sci...