Sentences with phrase «changes in vegetation as»

A new paper published in Frontiers in Earth Science by archeologist Dr. David Wright, from Seoul National University, challenges the conclusions of most studies done to date that point to changes in the Earth's orbit or natural changes in vegetation as the major driving forces.

[Response: Changes in vegetation as a response to warming as seen by satellites over the same areas are obviously caused by former - USSR apparatchiks painting the ground green.]

A new paper published in Frontiers in Earth Science by archeologist Dr. David Wright, from Seoul National University, challenges the conclusions of most studies done to date that point to changes in the Earth's orbit or natural changes in vegetation as the major driving forces.

Every layer suggested a change in vegetation as well as moisture, the kinds of other animals that were around, and the survival challenges faced by our ancient predecessors.

Not exact matches

As ancient man surveyed his world, he found himself surrounded on all sides with movement and change, not only in fellow - humans, animals and birds, but in running water, scudding clouds, heavenly bodies traveling across the sky, rising dust - storms, the occasionally quaking earth and the vegetation which sprang up, flowered, fruited and died.

In years of relatively low flow, changes in weir pool levels in conjunction with environmental water use can confer ecological benefits between the river and floodplain, such as nutrient exchange and wetting of fringing vegetatioIn years of relatively low flow, changes in weir pool levels in conjunction with environmental water use can confer ecological benefits between the river and floodplain, such as nutrient exchange and wetting of fringing vegetatioin weir pool levels in conjunction with environmental water use can confer ecological benefits between the river and floodplain, such as nutrient exchange and wetting of fringing vegetatioin conjunction with environmental water use can confer ecological benefits between the river and floodplain, such as nutrient exchange and wetting of fringing vegetation.

Change in Amazon greenness from 2000 to 2012, measured as Normalized Difference Vegetation Index (NDVI).

Vegetation change underway in boreal forests as a result of climate change creates a feedback loop that prompts more warming, scientists say

The Final Blow Graham and several of the other team members begin by ruling out possible causes, such as a change in vegetation to something less mammoth - friendly.

«Something subtler in the lead - up, such as increasing aridity and changes in vegetation, may be doing the damage.»

«Our results highlight the importance of the interactive effects of vegetation type, temperature and moisture in determining of the response of soil decomposition to climate change,» says lead author Julia Bradley - Cook, who conducted the study as part of her doctorate in Ecology and Evolutionary Biology at Dartmouth and who is now a Congressional Science Fellow.

Besides the increased emissions of N2O, the authors observed significant increases in the seasonal release of CO2 and CH4 as a result of only a mild temperature increase, and dug deeply into the reason behind the observed changes by detailed soil and vegetation measurements.

While the ECS factors in such «fast» feedback effects as changes in water vapor — water itself is a greenhouse gas, and saturates warm air better than cold — they argued that slow feedbacks, such as changes in ice sheets and vegetation, should also be considered.

Another change strongly suggests that as it aged Limusaurus gave up omnivory and switched to a plant - based diet: Larger individuals have swallowed stones that ostensibly helped the dinosaurs grind up vegetation and aided digestion, just as gizzard stones do in birds today.

Complex as they may be, the activities and effects of consumers should be incorporated into global vegetation models in order to accurately predict the likely consequences of global change.

In this study, researchers examined vegetation change as a function of wildfire disturbance and climate change over a 100 - year period.

To explore how well the timing of the changes matched up, the researcher focused on a carbon isotope called 13C, which is retained in soil in the same proportions as in the vegetation the soil once contained.

Given the inverse relationship observed between their values, it has been possible to determine the additional area of vegetation needed (in this case of green roofs) necessary to reduce the temperature by the same amount as it is predicted to rise in different climate change models for Seville.

«I initially was interested simply in determining how closely timed the calving season was to the onset of vegetation green - up,» Post explained, «without a thought as to how this relationship might be affected by climate change.»

Since 1982, researchers at this arid, semi-arid site have studied dramatic changes in vegetation, as perennial grasslands give way to shrubland in a process known as desertification.

It is widely known that the terrestrial biosphere (the collective term for all the world's land vegetation, soil, etc.) is an important factor in mitigating climate change, as it absorbs around 20 % of all fossil fuel CO2 emissions.

-- 7) Forest models for Montana that account for changes in both climate and resulting vegetation distribution and patterns; 8) Models that account for interactions and feedbacks in climate - related impacts to forests (e.g., changes in mortality from both direct increases in warming and increased fire risk as a result of warming); 9) Systems thinking and modeling regarding climate effects on understory vegetation and interactions with forest trees; 10) Discussion of climate effects on urban forests and impacts to cityscapes and livability; 11) Monitoring and time - series data to inform adaptive management efforts (i.e., to determine outcome of a management action and, based on that outcome, chart future course of action); 12) Detailed decision support systems to provide guidance for managing for adaptation.

It is important to regard the LGM studies as just one set of points in the cloud yielded by other climate sensitivity estimates, but the LGM has been a frequent target because it was a period for which there is a lot of data from varied sources, climate was significantly different from today, and we have considerable information about the important drivers — like CO2, CH4, ice sheet extent, vegetation changes etc..

We call this the Charney climate sensitivity, because it is essentially the case considered by Charney (1979), in which water vapor, clouds and sea ice were allowed to change in response to climate change, but GHG (greenhouse gas) amounts, ice sheet area, sea level and vegetation distributions were taken as specified boundary conditions.

Program fellows from the 2009 — 2014 grant tackled problems of interest to Kansans such as the expansion of woody vegetation in rangelands, disease outbreaks in small mammal populations, or how insects respond to temperature change.

This approach allowed the researchers to identify Earth ecosystems that responded quite sensitively to changes in climate parameters, as opposed to those that did not — deriving a «vegetation sensitivity index» across the planet.

This outcome is important to researchers as well as policymakers and regulators, who use exposure metrics to assess how changes in ozone levels affect human health, vegetation, and climate.

Geography is the most opted one - course program by most of the students as they get to learn many fascinating facts and things about the earth related to the weather studying, climate change factor, flora and fauna, accumulation of vegetation all such factors student studies in geography.

However the changes in the vegetation and landscape as you climb through different climatic zones will keep you involved with the hike and focussed on discovering more as you climb.

As we descend we'll feel the climate changing, becoming warmer and more alive, with more variety in vegetation, and we'll be accompanied by hummingbirds along the way.

As we ascend the mountain, we will notice a change in temperature and vegetation; we will see coffee plantations As we ascend the mountain, we will notice a change in temperature and vegetation; we will see coffee plantations asas

The bedroom, which epitomizes refined comfort, opens onto a veranda immersed in luxuriant vegetation: olive and strawberry trees grow alongside rocks hewn and sculpted by the region's prevailing winds, creating a setting that gradually changes as the day progresses.

That is, other feedbacks come into play — vegetation, ice sheets, aerosols, CH4 etc. will all change as a function a warming (or cooling), which are not included in the standard climate sensitivity definition.

i.e. changes in precipitation, vegetation, deep ocean currents, etc. are at any time as likely to cool as to heat.

[Response: I don't claim any particular special competence in the vegetation response to changing climate, but it will clearly depend on region, and it will depend crucially on changes to precipitation patterns as well as temperature or CO2 fertilization.

They certainly don't suggest, as Dan H does, that modest changes in agricultural methodologies can lead to vegetation acting as a sink for 100 % of emissions.

Instead, to constrain the Charney sensitivity from the ice age cycle you need to specifically extract out those long term changes (in ice sheets, vegetation, sea level etc.) and then estimate the total radiative forcing including these changes as forcing, not responses.

I never said that modest changes in vegetation would act as a sink for all the carbon emissions.

The mass balance and d13C balance shows that vegetation as sink is not large enough to absorb all human CO2 if the oceans are a source and ice cores show that CO2 and temperature go to a (surprisingly linear) new equilibrium for every change in temperature level, not a sustained increase or decrease.

The change happens as more vegetation grows in the warming Arctic, and forests struggle to survive against fire and insect infestations in warmer and drier conditions.

More exact for the partitioning between oceans and vegetation are found in the oxygen balance, but with large margins of error, as oxygen change measurements (a few ppmv in 200,000 ppmv) are extremely difficult, at the edge of the accuracy of the methods used.

These experimental regions are intentionally extreme in vegetation consequences (i.e., full conversion from forest to grassland functional types without ecologically intermediate types in order to act as bounding calculations that we use to reveal remote changes in GPP.

The natural variation that has led us out of the Little Ice Age has a bit of frosting on the cake by land use; and, part of that land use has resulted in a change in vegetation and soil CO2 loss so that we see a rise in CO2 and the CO2 continues to rise without a temperature accompaniment (piano player went to take a leak), as the land use has all but gobbled up most of the arable land North of 30N and we are starting to see low till farming and some soil conservation just beginning when the soil will again take up the CO2, and the GMO's will increase yields, then CO2 will start coming down on its own and we can go to bed listening to Ave Maria to address another global crisis to get the populous all scared begging governments to tell us much ado about... nothing.

Even if we stopped emitting greenhouse gases today, fire conditions will become even more persistent in areas already at risk, and will spread to new regions as warming drives vegetation patterns and land - use changes.

Changes in ocean chemistry, which can be described through the Revelle buffer factor [1], limit oceanic removal of CO2 [2], while the potential for terrestrial vegetation to take up CO2 is also predicted by some models to fall as the climate warms [3], although the size of this feedback is uncertain [4].

Broad - scale changes in vegetation in general, and tree loss in particular, have pronounced effects on climate processes through biogeophysical mechanisms such as albedo, evapotranspiration (ET), and carbon dioxide exchange with the atmosphere [11].

Taking into account CO2 - induced changes in vegetation, global mean runoff under a 2 * CO2 climate has been simulated to increase by approximately 5 % as a result of reduced evapotranspiration due to CO2enrichment alone («physiological forcing»)(Betts et al., 2007; Leipprand and Gerten, 2006).

A significant component of this key ecosystem characteristic is dependent on relatively slow processes such as rates of recuitment, mortality, and changes in vegetation composition.

Future global vegetation carbon change calculated by seven global vegetation models using climate outputs and associated increasing CO2 from five GCMs run with four RCPs, expressed as the change from the 1971 — 1999 mean relative to change in global mean land temperature.

Land use influences the climate system in many different ways including direct emissions from land - use change, hydrological impacts, biogeophysical impacts (such as changes in albedo and surface roughness), and the size of the remaining vegetation stock (influencing CO2 removal from the atmosphere).