Sentences with phrase «occur at cold temperatures»

Not exact matches

FOOD LOSS Postharvest food losses - occurring at the production, harvest, postharvest and processing phases - are the most important source of FLW in developing countries, due to poor infrastructure, poor temperature management, low levels of technology and low investment in the food production systems, especially the cold chain.

«The maximum concentration of (invisible) water vapor which can occur in air decreases to extremely low values at very cold temperatures.

The researchers also expect new phenomena to occur at such low temperatures involving, for example, how cold atoms interact with surfaces and how atoms move when they are confined to a narrow channel or layer.

Sensitivity to cold and lowered morning body temperatures are also red flags; Dekel said morning temperatures as low as 95.5 degrees Fahrenheit can occur in thyroid patients — a situation which limits function, as body enzymes work most effectively at 98.6 degrees.

The water temperature roughly cold as the thermocline occurs quite often, it can reach 20 degrees C, be well prepared to dive at this point is a must like BCD, Regulator and Wet Suit.

«in the United States, extremes of high temperatures have been occurring at a rate of twice those of cold extremes (Meehl et al. 2009), and this has accelerated considerably since June 2010 to a factor of 2.7, and in the summer of 2011 to a factor of over 8 ″

The snow and ice feedback is generally positive and becomes very large at very cold temperatures; obviously it approaches zero when the temperature is sufficiently warm that very little snow or ice remain and when they occur when and where there is little solar radiation to reflect.

The second thing that must occur; after the water Temperature stalls at 273.15 Kelvins, is that 80 calories per gram of water, must be removed to some colder heat sink, again per the second law, and only after that heat energy, is sucked out of the water by a continuous thermal chain of ever cooler thermally conductive media, to some far cooler place, can the liquid water molecules close in on each other as the water turns to ice.

Springtime cold air outbreaks (at least two consecutive days during which the daily average surface air temperature is below 95 % of the simulated average wintertime surface air temperature) are projected to continue to occur throughout this century.19 As a result, increased productivity of some crops due to higher temperatures, longer growing seasons, and elevated CO2 concentrations could be offset by increased freeze damage.20 Heat waves during pollination of field crops such as corn and soybean also reduce yields (Figure 18.3).4 Wetter springs may reduce crop yields and profits, 21 especially if growers are forced to switch to late - planted, shorter - season varieties.

For example in the United States, extremes of high temperatures have been occurring at a rate of twice those of cold extremes (Meehl et al. 2009), and this has accelerated considerably since June 2010 to a factor of 2.7, and in the summer of 2011 to a factor of over 8 (Skolnik 2011).

The destruction of ozone by CFC compounds requires cold conditions because at these temperatures acidic gases (hydrochloric and sulphuric acid) condense to form ice crystals and surface chemistry reactions with CFCs occur liberating the ozone destroying halogen radicals.

''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian Sea, developing a 1000 - year proxy temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed, as the seven scientists describe it, that «the lowest isotope values (highest temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near - surface water temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale temperature variability of 1 to 2 °C magnitude.»

Instead, we suggest that it is because the temperatures at ground level in the Arctic winter are cold enough to cause something similar to the phase change which occurs at the tropopause.

Apart from colder regions and seasons, characterised by greater internal climate variability, the odds of warm events are found to have significantly increased and temperatures above the threshold of 1 - in - 10 year events during 1961 — 1990 have become at least twice as likely to occur.

During the cool season, the Ridge brought long stretches of cloudless days, which caused daytime temperatures during winter to be well above average (and, at the same time, the position of the ridge also prevented major cold air outbreaks from occurring after December 2013).

Roughly speaking, in the part of the spectrum where the atmosphere is optically thick, the radiation to space occurs at the temperature of the high, cold parts of the atmosphere.