Sentences with phrase «by hydrological»

Only if the oceans freeze across their entire surfaces thereby causing the hydrological cycle to cease or if the sun puts in energy faster than it can be pumped upward by the hydrological cycle will the basic temperature equilibrium derived from the properties of water and the density and pressure of the atmosphere fail to be maintained.

Nobody disputes that physics but there is much empirical evidence that it can not give rise to AGW (e.g. AGW is observed to be counteracted by the hydrological cycle).

Not exact matches

The scale and duration of watering in 2015 - 16 was guided by seasonal conditions and natural hydrological cues.

Releases of Commonwealth environmental water from storage commenced in June 2015 and were guided by natural hydrological cues.

«Fragile hydrological equilibrium in the Western Amazon threatened by climate change.»

According to the authors, since the 1970s, when studies conducted by Professor Eneas Salati demonstrated that the Amazon generates approximately half of its own rainfall, the question has been raised of how much deforestation would be required to degrade the region's hydrological cycle to the point at which it would be unable to support rainforest ecosystems.

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.

Now a new study led by researcher Eduardo Maeda from the University of Helsinki has put together a unique combination of satellite data and hydrological measurements to study the problem.

The researchers from Wageningen University & Research, Bogor Agricultural University in Indonesia, University of East Anglia and the Center for International Forestry Research analysed the spatially distributed pattern of hydrological drought, that is the drought in groundwater recharge, in Borneo using a simple transient water balance model driven by monthly climate data from the period 1901 - 2015.

Using high - resolution cloud models, researchers from the Max Planck Institute for Meteorology in Hamburg, the Swedish Meteorological and Hydrological Institute in Norrköping and the Niels Bohr Institute at the University of Copenhagen analysed how heavy rainfall is affected by rising temperatures.

By using a combination of crop growth, hydrological, carbon and nitrogen cycle models, researchers found that the estimated land suitable for bioenergy grasses — particularly Miscanthus, the most productive bioenergy crop — is limited, despite its relatively high biomass productivity and low water consumption per unit of ethanol.

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.

Using a digital terrain model of the landscape and a hydrological model simulation the scientists found that planting trees on the floodplain and increasing the number of logjams, across 10 - 15 per cent of the total river length could reduce the peak height of a potential flood in the town by 6 per cent once the trees had grown for 25 years.

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

Guest argues convincingly that this nasty little war has its roots in the hydrological changes brought about by a dam jointly constructed by the two nations on the River Senegal at Lake Manantali.

New data show that extreme weather events have become more frequent over the past 36 years, with a significant uptick in floods and other hydrological events compared even with five years ago, according to a new publication, «Extreme weather events in Europe: Preparing for climate change adaptation: an update on EASAC's 2013 study» by the European Academies» Science Advisory Council (EASAC), a body made up of 27 national science academies in the European Union, Norway, and Switzerland.

And how important is it to try to improve hydrological functioning by using low - impact development solutions rather than traditional storm - water solutions.

Humans alter that hydrological cycle through water use demand - irrigation being a large use - and cause changes in water supply by affecting evaporation and runoff.

The global science community still isn't entirely sure what caused the repeated cycles — there may have been larger oceans in the northern hemisphere that powered a hydrological cycle (evaporation, condensation, precipitation), or shorter cycles could've been caused by volcanic activity or asteroid / comet impacts.

«Effects of uranium mining discharges on water quality in the Puerco River basin, Arizona and New Mexico,» by Peter C. Van Metre & John R. Gray, US Geological Survey; Hydrological Sciences Journal / Des Sciences Hydrologiques, Vol.

The surrounding limestone is full of caves, and it was only by tracing coloured dyes that it was ever discovered that this was the hydrological connection.

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.

By the 2100 humankind could be looking at a very different world, 7 metres more water apparantly, a slowdown of the worlds thermohaline system which could plunge northern europe into some canada style winters, a major realignment of the planets hydrological cycle which would mean drought and monsoons where none exist now perhaps, the disapperance of the Amazon rainforest, more extreme el ninos that last a lot longer along with the sister efect (la nina I think.

After I posted on Twitter to promote a fine Times story about a Missouri flood victim, a reply * directed my attention to a column by Tony Messenger in the St. Louis Post-Dispatch showing, yet again, how communities ignore inconvenient hydrological and geophysical realities:

Global warming is one kind of climate change caused by an increased greenhouse effect with an impact on both meteorology and the hydrological cycle.

New Paper by Nichols et al Hydroclimate of the northeastern United States is highly sensitive to solar forcing http://www.agu.org/pubs/crossref/2012/2011GL050720.shtml it is stated: We propose that the Arctic / North Atlantic Oscillation (AO / NAO) can amplify small solar fluctuations, producing the reconstructed hydrological variations.

Aerosols exert a forcing on the hydrological cycle by modifying cloud condensation nuclei, ice nuclei, precipitation efficiency, and the ratio between solar direct and diffuse radiation received.

Wetherald and Manabe (2002) provide a good description of the mechanism of hydrological change simulated by GCMs.

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).

«On the other hand,» comment the good folks at CO2Science.Org, «it could mean that the «anticipated hydrological impacts» envisioned by the IPCC and others are simply incorrect.»

-- was conducted by R. M. Hirsch and K. R. Ryberg of the U.S. Geological Survey (USGS) and published in Hydrological Sciences Journal.

Detection of change in world - wide hydrological time series of maximum annual flow: report by a team of experts under the leadership of Zbigniew W. Kundzewicz.

Spatial and temporal differences in thermal response to storm events were controlled by precipitation and stream discharge peak characteristics (above) plus antecedent basin conditions, which together determine the nature and rapidity of hydrological response.

Development, use and application of the HYDROSPECT data analysis system for the detection of changes in hydrological time series for use in WCP - Water and National Hydrological Services: report by Maciej Radzeijewski and Zbigniew W.hydrological time series for use in WCP - Water and National Hydrological Services: report by Maciej Radzeijewski and Zbigniew W.Hydrological Services: report by Maciej Radzeijewski and Zbigniew W. Kundzewicz.

A survey of current approaches to modelling of hydrological time - series with respect to climate variability and change by George S. Cavadias; prepared for the World Climate Program - Water, Project A2.

For each 1 degree Celsius of temperature increase, the hydrological cycle intensifies by 8 percent.

Grid estimation of runoff data: report of the WCP - Water Project B. 3: development of grid - related estimates of hydrological variables by Lars Gottschalk and Irina Krasovskaia.

Trends in flood and low flow hydrological time series: report by Cecilia Svensson, Zbigniew W. Kundzewicz and Thomas Maurer.

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.

Such natural extremes from climate persistence are quantitatively modeled by Harold E. Hurst (1951) in his breakthrough hydrological analysis of the 813 year record of Nile river flows (Rikert 2014).

``... since uncertainty is a structural component of climate and hydrological systems, Anagnostopoulos et al. (2010) found that large uncertainties and poor skill were shown by GCM predictions without bias correction... it can not be addressed through increased model complexity....

``... snow pack has decreased and been observed to melt earlier in the calendar year... the observed changes in the hydrological components... can be explained well by anthropogenic forcing (green house gases and aerosols) alone.»

Contribution from working group I to the fifth assessment report by IPCC TS.5.4.1 Projected Near - term Changes in Climate Projections of near - term climate show small sensitivity to Green House Gas scenarios compared to model spread, but substantial sensitivity to uncertainties in aerosol emissions, especially on regional scales and for hydrological cycle variables.

Degradation of near - surface permafrost (perennially frozen ground) caused by modern climate change is adversely affecting human infrastructure, altering Arctic ecosystem structure and function, changing the surface energy balance, and has the potential to dramatically impact Arctic hydrological processes and increase greenhouse gas emissions.

This publication, developed by the UNESCO International Hydrological Programme (IHP) and the Man and Biosphere Programme (MAB), features satellite images of different mountain regions worldwide, many of which are UNESCO Biosphere Reserves and World Heritage sites.

While the local nature of ABCs around polluted cities has been known since the early 1900s, the widespread transoceanic and transcontinental nature of ABCs as well as their large - scale effects on climate, hydrological cycle, and agriculture were discovered inadvertently by The Indian Ocean Experiment (INDOEX), an international experiment conducted in the 1990s over the Indian Ocean.

But it was always at a rate that could easily be accommodated by natural feedback processes if CO2 levels got too high — usually in the form of increased rock weathering through an acceleration of the hydrological cycle.

Further developments of RCMs as a Regional Earth System Exploration tool, by linking the traditional meteorological models to hydrological, biogeophysical and socio - economic components, can further develop their usefulness in practice.