Sentences with phrase «on changes in vegetation»

Livestock grazing and fire suppression effects, for example, have arguably had minimal effects on changes in vegetation and fuel dynamics in many shrublands (e.g., southern California chaparral) or in higher elevation spruce - fir forests.

I was pleased upon reading Linda Geddes's piece on changes in vegetation around animal graves (10 April, p 18) to...

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.

The results suggest that recent changes in global vegetation have had impacts on local climates that should be considered in the design of local mitigation and adaptation plans.

Dinets, who has traveled extensively on both sides of the Bering Strait, notes that in the past 20 years, the vegetation of the region has changed dramatically.

In addition to ignoring the long - term outlook, he says, many skeptics also fail to mention the potentially most harmful outcome of rising atmospheric CO2 on vegetation: climate change itself.

«We found that vegetation change may have a greater impact on the amount of stream flow in the Sierra than the direct effects of climate warming,» said lead author Ryan Bart, a postdoctoral researcher at UCSB's Bren School of Environmental Science & Management.

So if you think of going in [a] warming direction of 2 degrees C compared to a cooling direction of 5 degrees C, one can say that we might be changing the Earth, you know, like 40 percent of the kind of change that went on between the Ice Age; and now are going back in time and so a 2 - degree change, which is about 4 degrees F on a global average, is going to be very significant in terms of change in the distribution of vegetation, change in the kind of climate zones in certain areas, wind patterns can change, so where rainfall happens is going to shift.

«Most climate models that incorporate vegetation are built on short - term observations, for example of photosynthesis, but they are used to predict long - term events,» said Bond - Lamberty, who works at the Joint Global Change Research Institute, a collaboration between PNNL and the University of Maryland in College Park, Md. «We need to understand forests in the long term, but forests change slowly and researchers don't live that long.&Change Research Institute, a collaboration between PNNL and the University of Maryland in College Park, Md. «We need to understand forests in the long term, but forests change slowly and researchers don't live that long.&change slowly and researchers don't live that long.»

The event also caused huge changes in land vegetation, and while it remains a mystery why the dinosaurs survived this event, they went on to fill the vacancies left by the now extinct wildlife species, alongside early mammals and amphibians.

An example would be the indirect effects of sea stars on vegetation in the rocky intertidal zone caused by changes in mussel density via predation.

Instruments on the platforms will monitor changes in the concentrations of gases such carbon dioxide, which is mainly produced when vegetation is burnt during the dry season.

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.

The findings, published in the journal Global Change Biology, are based on spatial and statistical analyses of historical climate data, satellite data on current vegetation, and projections of potential vegetation under climate cChange Biology, are based on spatial and statistical analyses of historical climate data, satellite data on current vegetation, and projections of potential vegetation under climate changechange.

«The Illinois State Museum is deeply respected in the scientific community for the expertise of its curators and for its irreplaceable collection of archaeological, cultural, and paleontological artifacts,» says paleoecologist Jack Williams of the University of Wisconsin, Madison, who has used the Neotoma database to explore vegetation change over the past 20,000 years on a continental and global scale.

«Our finding that vegetation plays a key role future in terrestrial hydrologic response and water stress is of utmost importance to properly predict future dryness and water resources,» says Gentine, whose research focuses on the relationship between hydrology and atmospheric science, land / atmosphere interaction, and its impact on climate change.

-- 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.

'' in response to rising CO2 emissions and warmer temperatures, but these new results suggest there could also be a negative impact of climate change on vegetation growth in North America.

On the whole, the Earth's land surface has «greened» in response to rising CO2 emissions and warmer temperatures, but these new results suggest there could also be a negative impact of climate change on vegetation growth in North AmericOn the whole, the Earth's land surface has «greened» in response to rising CO2 emissions and warmer temperatures, but these new results suggest there could also be a negative impact of climate change on vegetation growth in North Americon vegetation growth in North America.

The last two lessons focus on model - based climate change projections in relation to the possible fates of different regional species of vegetation.

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.

Release of Carbon in melting permafrost being one, and changes in ocean temperatures and distribution of land vegetation and so on will clearly complicate the issue.

[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.

The discrepancy is because we measured the impacts on vegetation and soils achieved by ranchers managing at the ranch scale and adapting management in response to changing circumstances in order to achieve desirable outcomes» (Teague, et al 2011 (ISBN 978 -1-60692-023-7)-RRB-.

The paper in Nature Climate Change, «Temperature and vegetation seasonality diminishment over northern lands,» pulls together a wide array of research, including the work by Bruce Forbes of the University of Lapland last year, on what I called «pop - up forests» — patches of rapidly - growing tundra shrubs.

For example, Dafflon et al. [2017] demonstrated in a polygonal tundra how soil electrical resistivity tomography and vegetation activity cameras can be merged with in situ measurements in a way to corroborate the role of active layer thickness and polygon geometry on spatial control on productivity, and demonstrate how changes in solute concentration and unfrozen water content in winter contributes to acceleration of permafrost thaw.

Researchers have repeatedly warned that climate change puts biodiversity at risk, especially in the tropical forests, themselves at risk from global warming that will have consequences that could in turn accelerate forest loss and the biodiversity of life sheltered by those forests, embracing both vegetation and the creatures that depend on the vegetation.

That is very clever, since humans have had impact on the climate since sheep over grazed in the Middle East and farmers started diverting water and changing vegetation and land use.

Climate change may also augment or intensify other stresses on vegetation encountered in urban environments, including increased atmospheric pollution, heat island effects, a highly variable water cycle, and frequent exposure to new pests and diseases.

The observed global greening has occurred in spite of all the many real and imagined assaults on Earth's vegetation that have occurred over the past several decades, including wildfires, disease, pest outbreaks, deforestation, and climatic changes in temperature and precipitation, more than compensating for any of the negative effects these phenomena may have had on the global biosphere.

Based on evidence from Earth's history, we suggest here that the relevant form of climate sensitivity in the Anthropocene (e.g. from which to base future greenhouse gas (GHG) stabilization targets) is the Earth system sensitivity including fast feedbacks from changes in water vapour, natural aerosols, clouds and sea ice, slower surface albedo feedbacks from changes in continental ice sheets and vegetation, and climate — GHG feedbacks from changes in natural (land and ocean) carbon sinks.

«What happens on the surface of the earth (in terms of changes in vegetation) is a big factor in climate change,» she said.

while in the context of the ongoing climate debate we continue — albeit with some embarrassment — to employ the scientifically meaningless phrase «climate change», we recognise that, in principle, a planetary warming to fend off otherwise imminent glacial inception, together with CO2 greening (the latter offsetting loss of vegetation footprint, the only real environmental concern) is having broad positive impacts on society, including the global economy, natural resources, and human health.

Based on oxygen use and the changes in 13C / 12C ratio, some come to about 1 / 3rd in vegetation, 2 / 3rd in the (deep) oceans.

The 1942 «peak» is nowhere seen in any other direct measurement (high resolution ice cores from Law Dome) neither in stomata data for the past century, neither in coralline sponges, the latter based on 13C / 12C ratio's which certainly should change if there was an important change in inputs or outputs from vegetation or oceans.

So I think, around the carbon budgets, a question that I would like to see more clarity on is whether land - based vegetation will continue to absorb carbon dioxide at the rate it currently is, or whether in a future climate, that drawdown of carbon by plants on land will change.

The resultant local changes in microclimate can have broader - scale impacts on climate and vegetation elsewhere via «ecoclimate teleconnections» [12,13].

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.

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].

Land comprises only about 30 % of the Earth's surface, but it can have the largest effects on the reflection of global solar radiation in conjunction with changes in ice and snow cover, and the shading of the latter by vegetation.

A sentence in Chapter 13 of the 2007 IPCC Fourth Assessment Report on Impacts, Adaptation and Vulnerability states: «Up to 40 percent of the Amazonian forests could react drastically to even a slight reduction in precipitation; this means that the tropical vegetation, hydrology and climate system in South America could change very rapidly to another steady state, not necessarily producing gradual changes between the current and the future situation.»

It was an excellent and thorough paper on the changes in Estonian swamp vegetation in the last 30 years, with many many beautiful graphs, but for me there was just one question — namely there, in the paper, there was absolutely no evidence or even indication that these these changes were the the result of global warming!

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.

They include the physical, chemical and biological processes that control the oceanic storage of carbon, and are calibrated against geochemical and isotopic constraints on how ocean carbon storage has changed over the decades and carbon storage in terrestrial vegetation and soils, and how it responds to increasing CO2, temperature, rainfall and other factors.

As further detailed in Section 7.3, climate change and CO2 variations on various time scales can change vegetation cover in semi-arid regions.

Estimating the carbon stocks in terrestrial ecosystems and accounting for changes in these stocks requires adequate information on land cover, carbon density in vegetation and soils, and the fate of carbon (burning, removals, decomposition).

Indeed, the long lifetime of fossil fuel carbon in the climate system and persistence of the ocean warming ensure that «slow» feedbacks, such as ice sheet disintegration, changes of the global vegetation distribution, melting of permafrost, and possible release of methane from methane hydrates on continental shelves, would also have time to come into play.

I have recently unintentionally noticed that the UV radiation is killing the leafs of trees and plants the most exposed leaves to the sun are dying on many types of vegetation plus we have fires hazing the sky up which means more CO2 thanks to grindall61 (A YouTube channel) I hope I am spelling it correctly he goes to meetings in Southern California and records them we know that the state of California is because increasingly aggressive in reducing greenhouse gases even to the extremes of renting bikes and of course climate change is going to be used as an excuse to take away our rights don't fall for there wickedness but how can a serious state like California at least that's what I'm calling it here claim to want to fight climate change yet being ignorant on climate engineering this is a joke citizens stand up for your country.

Posted in Adaptation, Agriculture, Biodiversity, Development and Climate Change, Environment, Health and Climate Change, Information and Communication, Lessons, News, Research Comments Off on Climate Alters Global Vegetation

States that other feedbacks likely to emerge are those in which key processes include surface fluxes of trace gases, changes in the distribution of vegetation, changes in surface soil moisture, changes in atmospheric water vapor arising from higher temperatures and greater areas of open ocean, impacts of Arctic freshwater fluxes on the meridional overturning circulation of the ocean, and changes in Arctic clouds resulting from changes in water vapor content