Air sampling in health care facilities, especially in specialcare areas such as neonatal intensiv? care units (NICUs), should be done on a periodic basis ln Order to determine indoor air quality, efficacy of dust control measures, or airhandling system performance. (The draft guideline is available with the full text of this article at http://www.cdc.gov/ ncidod/hip/enviro/env_guide_draft.pdf) ...

Abstract Surface energy budgets of high-latitude permafrost systems are poorly represented in Earth system models (ESMs), yet is rapidly degrading and these dynamics critical to future carbon-climate feedback predictions. A potentially important factor degradation neglected so far by ESMs heat transfer from precipitation, although increases soil temperature thaw depth have been observed followi...

SEPTEMBER 2014 AMERICAN METEOROLOGICAL SOCIETY | precipitation amount is only the 18th highest of the analogue time series, showing that even if the atmospheric conditions were favorable to wet conditions over Southern Europe, they do not fully explain the exceptional character of the precipitation anomaly. We conjecture that a potential amplifying cause could be that the oceanic air masses car...

This study examines the characteristics of winter (Dec–Feb) rain-on-snow events and their relationship to surface air temperatures to reveal potential changes in rain-on-snow days under a warming climate over northern Eurasia. We found that rain-on-snow events mostly occur over European Russia during winter. Rain-on-snow days increase as air temperature increases and are primarily attributable ...

In temperate portions of North America, some bats that remain active during winter undergo short periods of hibernation below leaf litter on the forest floor during episodes of below-freezing weather. These winter roosts may provide above-freezing conditions, but the thermal conditions under leaf litter are unclear. Further, little is known of the relationship between temperatures under litter ...

Analyzing a 6-km resolution atmospheric simulation of Southern California from 1995 to the present, we characterize climatological diurnal cycles of surface air temperature and winds. We find that these quantities have significant spatial structure due to dynamical links between them. The large daily warming and cooling over land induces expected flows across the coastline and elevation isoline...

We examine whether any trends in monthly temperatures are the same through-out the year for various lengthy series. The data concern the world, the northern and southern hemispheres, and about three centuries of data for the United Kingdom and the Netherlands. For the empirical exercise, we rely on new and accurate tests which have been recently developed. These tests do not have standard distr...