The high cliffs of Eastern Siberia, which mainly consist of permafrost, continue to erode at an ever quickening pace. This is the conclusion which scientists of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research have reached after their evaluation of data and aerial photographs of the coastal regions for the last 40 years. According to the researchers, the reasons for th ... read more >>
The future adequacy of freshwater resources is difficult to assess, owing to a complex and rapidly changing geography of water supply and use. Numerical experiments combining climate model outputs, water budgets, and socioeconomic information along digitized river networks demonstrate that (i) a large proportion of the world's population is currently experiencing water stress and (ii) rising wate ... read more >>
The Day After Tomorrow: coastal flooding like Sandy may become more frequent due to climate change says Dr. Horton
Dr Horton, a climate scientist presented his conclusions concerning factors that have influenced the hurricane Sandy’s damage level. “Even if storms say the same, higher see level alone may induce more frequent costal flood”. According to his research, the see level rise would be induced by the increase of GHG emissions. Those are mostly caused by human activities (industrial activities transport ... read more >>
A quick glance at a world precipitation map shows that most tropical rain falls in the Northern Hemisphere. The Palmyra Atoll, at 6 degrees north, gets 175 inches of rain a year, while an equal distance on the opposite side of the equator gets only 45 inches.
Scientists long believed that this was a quirk of Earth's geometry -- that the ocean basins tilting diagonally while the planet spins push ... read more >>
Transient, spatially varied groundwater recharge modeling - Assefa - 2013 - Water Resources Research - Wiley Online Library
The objective of this work is to integrate ﬁeld data and modeling tools in producing
temporally and spatially varying groundwater recharge in a pilot watershed in North
Okanagan, Canada. The recharge modeling is undertaken by using the Richards equation
based ﬁnite element code (HYDRUS-1D), ArcGISTM, ROSETTA, in situ observations of
soil temperature and soil moisture, and a long-term gridded ... read more >>
Catchment morphology and drainage density are strongly influenced by
hillslope processes. The consequences of several different hillslope process laws are
explored in a series of experiments with a numerical model of drainage basin evolution.
Five different models are considered, including a simple diffusive-advective process
transition, a runoff generation threshold, ... read more >>
In this paper, new methodologies for interpolating rainfall data in individual time intervals (ranging from a day to a year) using Gaussian copulas and unsymmetrical v-copulas, with a variety of treatments of altitude as an exogenous variable, are described. For shorter time aggregations, zeros were treated as censored variables. For each selected time step, the marginal distributions of precipit ... read more >>
One of the most controversial issues emerging from the recent Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) is the failure of global climate models to predict a hiatus in warming of global surface temperatures since 1998. Several ideas have been put forward to explain this hiatus, including what the IPCC refers to as 'unpredictable climate variability' that is ass ... read more >>
1- Last Friday, the Constitutional Council, the highest judicial instance in France, validated a 2011 law banning hydraulic fracturing in France. Hydraulic fracturing, also called fracking, is a technology used to exploit gas and oil shale. The provisions of this new act prohibit the exploration and exploitation of these hydrocarbons from fracking.
2- It is important because right now, only ... read more >>