Sentences with phrase «temperatures near trees»

Not exact matches

«This indicates that we need to work with the trees near the bottom of the mountain, because they are the ones that will feel the most stress from warming temperatures,» Van Nuland said.

Studies of fossil trees on a ridge of Mount Achernar in the Transantarctic Mountains near the Ross Ice Shelf show that temperatures in the region must have been warmer than they are today.

Many of the deepest branches in Woese's tree, those that join nearest to the three - way junction of the kingdoms, turned out to belong to organisms that live at high temperatures, as in the fuming springs in Yellowstone Park or the volcanic vents that gash the ocean floor.

That's because South Padre Island, located near the Mexico border, offers warm temperatures, towering palm trees, and stunning Gulf Coast beaches.

Chronologies developed from sites near to the elevational or latitudinal tree lines often show sensitivity to summer temperature and, because of their annual resolution, absolute dating and relatively widespread nature, they have contributed to many local, continental and hemispheric temperature reconstructions.

These trees not only giving you shade and cooler temperatures, but if placed near your A / C unit, can help it run more efficiently.

Growth rates are sensitive to many things, this is why so much care is taken to select samples that one might rightly suspect will be highly sensitive to temperature changes (such as trees growing near their altitudinal and latitudinal range extremes, which typically is due to the species limit of cold tolerance).

Its precisely because temperature becomes the leading limiting fact at treeline that such locations have been used for past temperature reconstructions, just like trees growing near their hydrological limits are chosen for drought reconstructions, etc..

This IS indeed possible for alpine treeline because the lateral scale of variation in temperature is short and such a near - neighbor comparison can be done between trees near and distal from treeline.

For instance, in Briffa et a 2001 they talk about trees being near altitudinal or longitudinal limits being good candidates because range is limited by temperature (not CO2 concentrations, or precip) and therefore relatively minor changes in temperature cause a relatively larger change in growth rate than trees growing in an area where conditions are more optimum.

The claim that tree proxies kinda look like the actual temperature for 40 or 60 years in the early 20th century if you are far away and near sighted doesn't mean they are a «calibrated proxy».

``... large - scale near - surface air - temperature reconstructions relying on tree - ring data may underestimate pre-instrumental temperatures including warmth during Medieval and Roman times.»

Breitenmoser et al. (2012) analyzed the ~ 200 - year periodicity during the past two millennia using seventeen near worldwide distributed tree chronologies, and found significant periodicities in the 208 - year frequency band, corresponding to the DeVries cycle of solar activity, indicating a solar contribution in the temperature and precipitation series.

Trees growing near to their ecological limits either in terms of latitude or altitude show growth limitations imposed by temperature and thus ring width variations in such trees contain a relatively strong temperature siTrees growing near to their ecological limits either in terms of latitude or altitude show growth limitations imposed by temperature and thus ring width variations in such trees contain a relatively strong temperature sitrees contain a relatively strong temperature signal.

Trees growing near to the latitudinal or altitudinal treeline are mainly under growth limitations imposed by temperature and hence ring - width variations in such trees contain a strong temperature siTrees growing near to the latitudinal or altitudinal treeline are mainly under growth limitations imposed by temperature and hence ring - width variations in such trees contain a strong temperature sitrees contain a strong temperature signal.

My mistake came in this sentence: «Yes, the effect of temperature on tree ring growth is likely to be an inverted quadratic, but that doesn't mean that local temperature never gets near the optimum or crosses over to the other side.»

cdquaries: Yes, the effect of temperature on tree ring growth is likely to be an inverted quadratic, but that doesn't mean that local temperature ever gets near the optimum or crosses over to the other side.

And as I used to see every summer, the combination of all of these factors means that the trees up near the treeline are often visibly stressed, branch tips turning brown, far into the downhill side of the inverse parabola, while trees a few hundred metres lower were doing fine at essentially the same temperature.

Thawing permafrost is also expected to alter area landscapes and make local ecosystems more susceptible to long - term damage, in part because permafrost degradation can lead to significant changes in local soil temperatures and moisture levels.14, 20,21 Soils on or near the banks of thermokarst ponds tend to be much drier than those on level tundra, owing to higher soil temperatures and drainage.14, 20,21 On the Seward Peninsula, the banks of these ponds host trees (usually spruces) and shrubs that are otherwise usually absent in the characteristically treeless tundra.14, 21

The City of Medford, while fulfilling its obligations for keeping river temperatures down near its White City wastewater treatment plant, is basically paying for the shady trees that landowners along a five - mile stretch are planting.

At the precise moment when the tree - ring proxies and actual temperatures are in near perfect agreement on a decades - long cooling trend, Mann dumps the tree rings and moves to «observed temperatures» - which have been conveniently revised upward from when they were originally observed.