Sentences with phrase «as hydrological»

The field of conservation biology identifies four objectives that must be achieved to ensure the longterm viability of an ecosystem: 1) all native ecosystem types must be represented in protected areas; 2) populations of all native species must be maintained in natural patterns of abundance and distribution; 3) ecological processes such as hydrological processes must be maintained; and 4) the resilience to short - term and long - term environmental change must be maintained.

I'll buy that as the hydrological cycle speeds up, it will shift more often.

And then they considered drought as a hydrological problem: that moment when lakes, reservoirs and aquifers begin to dry up.

Facilitate worldwide cooperation in the establishment of networks of stations for making meteorological observations, as well as hydrological and other geophysical observations related to meteorology, and to promote the establishment and maintenance of centres charged with the provision of meteorological and related services

One resolves in this manner the short - term components of the climate response, such as hydrological perturbations associated with changes in lapse rate.

Higher rates of precipitation from thunderstorms are becoming a more common event the world over as the hydrological cycle is amped up by the more than 1 degree Celsius of temperature increase that has already occurred since 1880.

Sea ice with its strong seasonal and interannual variability (Fig. 1) is a very critical component of the Arctic system that responds sensitively to changes in atmospheric circulation, incoming radiation, atmospheric and oceanic heat fluxes, as well as the hydrological cycle1, 2.

Part way there, but no quantitation yet: of the 3.77 W / m ^ 2 radiated back dowwnard, most goes to increased rate of evaporation of the water at the surface, and much less goes to increased mean temp increase at the surface; hence increased rate of non-radiative transfer of heat from surface to upper atmosphere, slight increase in rainfall as hydrological cycle is faster, and slight increase in cloud cover.

In particular, this information is building our understanding on the responses of vegetation, fish and frogs to environmental water as well as hydrological connectivity.

Not exact matches

As the Atlantic Wire's Philip Bump points out, the High Plains Aquifer has been a «hydrological savings account» for farmers in the Great Plains.

The new theory suggests the first of the two explosions reported by eyewitnesses was a nuclear and not a steam explosion, as is currently widely thought and is presented by researchers from the Swedish Defence Research Agency, Swedish Meteorological and Hydrological Institute, and Stockholm University.

Hydrological changes are broadly consistent with warming as well.

When comparing the history of hydrological changes in the region with artifacts from the Middle Stone Age, the researchers discovered a «striking correspondence between the archaeological record of South Africa and the timing of the abrupt climate change» as seen in the marine core, the study states.

The fossil therefore provides further evidence for a previously postulated hydrological connection between the eastern and western arms of the Rift Valley, which was subsequently severed as rifting progressed.

Climate change is having impacts not only on the hydrological cycle, resulting in increased droughts and floods1, but also on vital water resources and ecosystem services2, such as the ability to regulate water quality through sedimentation3.

«As you start varying the hydrological cycle of Indonesia, you almost have to vary the Earth's water vapor concentration.

Taking factors such as sea surface temperature, greenhouse gases and natural aerosol particles into consideration, the researchers determined that changes in the concentration of black carbon could be the primary driving force behind the observed alterations to the hydrological cycle in the region.

The trends driven by earlier snowmelt are likely to as they are «are very much in line with the projections of future climate» from climate models, study co-author Berit Arheimer of the Swedish Meteorological and Hydrological Institute said.

That's a growing problem, because in many places, finding water for energy isn't easy - and it's bound to get tougher as energy demands soar and climate change alters hydrological cycles in already arid regions.

«So as aerosols cut down sunlight by large amounts,» Ramanathan explains, «they may be spinning down the hydrological cycle of the planet.»

This is known as the global hydrological cycle.

The team used a hydrological model to calculate grain yields, which vary depending on factors such as climate and soil type.

Next, the team did some hydrological accounting, creating what's known as a water balance.

January 2004: «Directions for Climate Research» Here, ExxonMobil outlines areas where it deemed more research was necessary, such as «natural climate variability, ocean currents and heat transfer, the hydrological cycle, and the ability of climate models to predict changes on a regional and local scale.»

Because meter - scale suboxic zones occur today within the mobile mud belts of tropical river - dominated continental shelves, such as the Amazon Shelf, we hypothesize that sedimentological and hydrological changes during the PETM fostered the development of analogous conditions on the Eastern seaboard of North America.

DOERR SH, FERREIRA AJD, WALSH RPD, SHAKESBY RA, LEIGHTON - BOYCE G E COELHO COA Soil water repellency as a potential parameter in rainfall - runoff modelling: experimental evidence at point to catchment scales from Portugal (2003) Hydrological Processes,, vol.

UNESCO is committed to advancing these goals across the board, drawing on its unique «water family,» including our International Hydrological Programme, the Institute for Water Education in Delft, the World Water Assessment Programme in Perugia, as well as UNESCO centres and Chairs specialized in water around the globe.

Initially broken down into geological disasters, hydrological disasters, meteorological disaster, and space disasters, this graphic organizer includes 17 different natural disasters such as sinkholes, earthquakes, hurricanes, tornadoes, blizzards, tsunamis and many more.

One challenge has been that the state of the hydrological cycle is not as easily summarised by one single index in the same way as the global mean temperature or the global mean sea level height.

These shifts to wetter summers correspond with periods on enhanced continental runoff as expressed by the abundance of freshwater indicators such as the algae Pediastrum and the dinocyst taxon Bosedinia and areconsistent with enhanced hydrological cycling prior to, and during the PETM interval.The marked increase in WMMT and WMMP puts a new perspective on environ - 15 mental precursors to the injection of carbon during the PETM.

As an integrating measurement made with high accuracy, freshwater content (salinity anomaly over a layer) is the most sensitive yardstick available for observing the global fingerprint of a changing hydrological cycle.

As for your question about hurricanes, the argument given for the global mean hydrological cycle doesn't apply to the hurricane because the global mean argument assumes an equilibrium between radiative cooling and latent heat release.

As I read it, the Ancylus Lake drained slowly, with low hydrological head.

As an environmental scientist myself, with more than 10 years experience working with hydrological computer models, I am very wary of policy formulated on the output of models, especially with respect to a system as complex and poorly understood as the Earth's climate systeAs an environmental scientist myself, with more than 10 years experience working with hydrological computer models, I am very wary of policy formulated on the output of models, especially with respect to a system as complex and poorly understood as the Earth's climate systeas complex and poorly understood as the Earth's climate systeas the Earth's climate system.

The yearly hydrological redistribution of mass is visible in the GRACE data, as well as the more extreme melting seasons.

All the descriptions of the evaporative process that I have seen so far concern themselves just with the evaporative and precipitation aspects as part of the hydrological cycle and ignore the condensation part in so far as it releases heat energy higher in the atmosphere for faster radiation to space.

Whatever mistakes of writing and / or over-reaching reasoning Miskolczi may make, he is entirely correct in pointing to water vapor and the hydrological cycle as the regulating mechanism for surface temperature.

We need to look at the evaporative / condensation process combined with ALL aspects of global weather as an ever changing global heat energy removal system and not just as a part of the hydrological cycle as usually set out in models and schematic diagrams.

The end of the first half of the Holocene — between about 5 and 4 ka — was punctuated by rapid events at various latitudes, such as an abrupt increase in NH sea ice cover (Jennings et al., 2001); a decrease in Greenland deuterium excess, reflecting a change in the hydrological cycle (Masson - Delmotte et al., 2005b); abrupt cooling events in European climate (Seppa and Birks, 2001; Lauritzen, 2003); widespread North American drought for centuries (Booth et al., 2005); and changes in South American climate (Marchant and Hooghiemstra, 2004).

Yue et al (2002) Intro: «certain hydrological time - series, such as annual mean and annual minimum streamflows, may frequently display statistically significant serial correlation.

The warm moist air is readily advected onto land and caught up in weather systems as part of the hydrological cycle, where it contributes to more intense precipitation events that are widely observed to be occurring (IPCC 2007; Trenberth 2011a; Groisman and Knight 2008; Min et al. 2011; Pall et al. 2011).

with increasing stress on crops due to changes in the hydrological cycle and heat stress, more and more farmers are seeking answers from modified crops to heartier breeds of cattle that are more accustomed to drought conditions such as those that come from Africa and India.

I'm interested to use a global reanalysis data to force hydrological models such as SWAT for a meso watershed with sparse hydrometeorological stations.

More accurate and reliable precipitation data would be invaluable, not only for the study of climate trends and variability, but also as inputs to hydrological and ecological models and for model validation, characterization of extreme events, and flood and drought forecasting.

Whatever the cause — global hydrological and climate variability — extreme drought, extreme floods and extreme temperature changes such as has not been seen in the past century — will occur again.

These include hydrological events such as floods, storm surges, and coastal flooding, plus meteorological events like storms, tropical cyclones, heat / cold waves, drought, and wildfires.

These examples are intended as an illustration rather than a comprehensive list of the efforts undertaken by WMO and the National Meteorological and Hydrological Services (NMHSs) of its 189 Members, often with the support of development partners, to increasingly advance the vision of the Millennium Declaration.

Holocene hydrological changes in south - western Mediterranean as recorded by lake - level fluctuations at Lago Preola, a coastal lake in southern Sicily, Italy; Magny et al, 2011, see abstract here.

This technical document provides background information on groundwater protection with particular reference to its use in emergency situations as result of natural hazards and hydrological extremes.

This is not an academic exercise on the leading edge of discovery — it could well stay in ivory towers, and I suspect Tomas would be happy to remain there (as I would be in my little hydrological world), if not for the critical message that it has for the world.