Latest Psychrometrics Stories
Analysis of hourly airport cloud cover reports leads to surprising findingCalifornia's coastal fog has decreased significantly over the past 100 years, potentially endangering coast redwood trees dependent on cool, humid summers, according to a new study by University of California, Berkeley, scientists.It is unclear whether this is part of a natural cycle of the result of human activity, but the change could affect not only the redwoods, but the entire redwood ecosystem, the scientists...
U.S. scientists studying a mid-July to early August 2006 heat wave that struck the southwestern United States say such extremes are becoming more likely. The 2006 heat wave broke many high temperature and humidity records, scientists said, leading to the deaths of more than 600 people, 25,000 cattle and 70,000 poultry in California alone. An analysis of that episode by researchers at the Scripps Institution of Oceanography at the University of California-San Diego suggests such regional...
Researchers from Wageningen University used the warm days in August to map out the urban climate in two Dutch cities. The research team drove two cargo bicycles with measurement equipment during various times of a 24 hours' day through Rotterdam and Arnhem. The results may indicate to which extent heat stress may become a problem for the inhabitants.Future projections of climate change show that frequency of heat waves will increase substantially in the next decades. Particularly in...
Scripps climate researchers have issued a new study showing an increase in the number of hot, humid days in California.Led by Alexander Gershunov, of the University of California's Scripps Institution of Oceanography, the team examined a heat wave that hit the southwestern United States from mid July to early August 2006.They noted that temperature records were broken during this time and also noted a link between high humidity levels and the deaths of more than 600 people, 25,000 cattle and...
From mid July to early August 2006, a heat wave swept through the southwestern United States. Temperature records were broken at many locations and unusually high humidity levels for this typically arid region led to the deaths of more than 600 people, 25,000 cattle and 70,000 poultry in California alone.An analysis of this extreme episode carried out by researchers at Scripps Institution of Oceanography, UC San Diego, put this heat wave in the context of six decades of observed heat waves....
SAN DIEGO, Aug. 7 /PRNewswire/ -- As The National Football League gears up to celebrate its 50th Anniversary Season, Big Fogg(TM) Misting Systems of Temecula, CA is gearing up to provide misting systems on both sidelines for the Buffalo Bills - Tennessee Titans 2009 Hall of Fame game in Canton, Ohio on Sunday, August 9th. This marks the seventh year in a row that the NFL has commissioned Big Fogg to provide misting for its inaugural game. Big Fogg, known within the industry for being the...
Check the heat index, a U.S. sports health expert tells those exercising or competing in summer's heat and humidity. Gary Sforzo of Ithaca College in New York said checking the heat index before working out will help avoid heat exhaustion or heat stroke. The heat index combines the ambient temperature and humidity, Sforzo explains. Exercising in 100 degree heat in Texas when humidity is about 50 percent requires the same level of caution as exercising on the East Coast in 90 degree heat with...
AMESBURY, Mass., July 6 /PRNewswire/ -- Eight Munters ICA dehumidification systems valued at $4.75 million were ordered by CB&I, the engineering procurement and construction contractor, for the upgrade of the turbine engine dry air capability at Arnold Air Force Base in Tullahoma, TN. (Photo: http://www.newscom.com/cgi-bin/prnh/20090706/DA42387) The Munters equipment will supply low dewpoint air for jet engine testing. The test cells operate at low temperatures and pressures to...
LONDON, June 29 /PRNewswire/ -- The economic recession has caused a dramatic decrease in rail freight traffic volumes in Russia. While Russian rail operators have diversified their freight structure to preserve their market positions, some of the key rail manufacturers have partially halted production. (Logo: http://www.newscom.com/cgi-bin/prnh/20081117/FSLOGO) "If Russia continues its plans towards implementing high-speed transportation, its lack of experience in construction and...
Energy-Efficient Waterless Technology Provides Comfort without 'Swamp Cooler' Smell of Evaporative Air Coolers CANTON, Ohio, June 24 /PRNewswire/ -- Americans suffering through the summer heat are turning to the new waterless Air Cooler PLUS for air cooler comfort without the swamp cooler odor produced by water-based evaporative coolers. The new Air Cooler PLUS differs from conventional air coolers. Because it is waterless, Air Cooler PLUS provides effective cooling in even the muggiest...
Latest Psychrometrics Reference Libraries
Surface Dew-points can play a huge role in weather forecasting. The first such role is that it helps determine the amount of moisture in the atmosphere for a given point. If we look at the current dew-point map above from January 28, 2013 we can note several things of interest. First, if we look at where the black circle is around the number 70, we can make note that this air right off the coast of Texas is at a dew point of 70F. The temperature outside must be above 70F, because the...
The map above shows our dew-point temperatures which is an important temp when it comes to weather. The dew-points help us determine how much moisture is in the atmosphere. If we look at the circle placed over Southern Mississippi we can see temps in the Mid 70’s. That is considered to be very saturated and humid type of weather. When you walk outside it feels very uncomfortable. While if we look back in Nevada we see 15, this is more respectful of being very dry air. This type of air also...
So why is there so much heat and humidity rising up into the Northern Plains creating a surge of hot weather? The answer is in the weather map above. If we look over Lake Michigan we see an area of High pressure which has a clockwise flow over the region. So places on the East are having cooler weather as they are getting the air from Canada pushing down towards them. North Dakota into the Gulf Coast are on the back side of the high so there air is coming from the Gulf of Mexico. If...
Water vapor (aqueous vapor) is the gaseous phase of water. It is one stage of the water cycle of our planet. Water vapor is formed from either evaporation or heating of liquid water, or from the sublimation of ice. In nature, water vapor is continuously produced by evaporation and removed by condensation. Along with carbon dioxide and methane gas, water vapor is one of the greenhouse gases. The release of water molecules from liquid water is considered evaporation. The transition of these...
Haze is a type of atmospheric phenomenon where dust, smoke and dry particles in the air obscure the sky's clarity. Haze is created through various activities including farming, traffic pollution,and even wildfires. The World Meteorological Organization (WMO) categorizes the obscuration of the Earth's atmosphere by a list of different types of atmospheric phenomena. One of these is haze. The other classifications are: fog, ice fog, steam fog, mist, smoke, volcanic ash, dust, sand, and snow....
