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Occurrence of gas phase ammonia in the area of Beijing (China)
gas phase ammonia the area of Beijing (China)
2010/10/11
The atmospheric concentrations of gaseous ammonia have been measured during two field campaigns in the winter and in the summer of 2007 at Beijing (China). These measurements were carried out by means...
Frequency of occurrence of a certain air temperature at various sites in the Czech Republic
climatic conditions weather data altitude regression function
2014/2/26
The present paper analyses the problem of calculation of the average number of hours in a year during which air temperature is lower than a preselected limiting level. A method for estimating the numb...
Can gravity waves significantly impact PSC occurrence in the Antarctic?
gravity waves significantly PSC occurrence Antarctic
2009/12/3
A combination of POAM III aerosol extinction and CHAMP RO temperature measurements are used to examine the role of atmospheric gravity waves in the formation of Antarctic Polar Stratospheric Clouds (P...
VOC measurements within a boreal forest during spring 2005: on the occurrence of elevated monoterpene concentrations during night time intense particle concentration events
VOC measurements boreal forest monoterpene concentrations
2009/11/19
In this study we present measurements of selected trace gases and aerosols made in a boreal forest during the BACCI-QUEST IV intensive field campaign in Hyytiälä, Finland in April 2005. Spri...
Unexpected Occurrence of Fog.
Cirrus cloud occurrence as function of ambient relative humidity: a comparison of observations obtained during the INCA experiment
Cirrus cloud occurrence ambient relative humidity INCA experiment
2009/3/11
Based on in-situ observations performed during the Interhemispheric differences in cirrus properties from anthropogenic emissions (INCA) experiment, we introduce and discuss the cloud presence fractio...
Occurrence of ozone anomalies over cloudy areas in TOMS version-7 level-2 data
ozone anomalies cloudy areas TOMS
2009/3/11
This study investigates anomalous ozone distributions over cloudy areas in Nimbus-7 (N7) and Earth-Probe (EP) TOMS version-7 data and analyzes the causes for ozone anomaly formation. A 5°-longitude by...
Ultrathin Tropical Tropopause Clouds（UTTCs）：I. Cloud morphology and occurrence
Ultrathin Tropical Tropopause Clouds UTTCs Cloud morphology
2009/3/11
Subvisible cirrus clouds (SVCs) may contribute to dehydration close to the tropical tropopause. The higher and colder SVCs and the larger their ice crystals, the more likely they represent the last ef...
Differences in Arctic and Antarctic PSC occurrence as observed by lidar in Ny-Ålesund（79° N, 12° E）and McMurdo（78° S, 167° E）
Arctic Antarctic PSC lidar Ny-Å lesund McMurdo
2009/2/16
The extent of springtime Arctic ozone loss does not reach Antarctic ``ozone hole'' dimensions because of the generally higher temperatures in the northern hemisphere vortex and consequent less polar s...
Correlation between equatorial Kelvin waves and the occurrence of extremely thin ice clouds at the tropical tropopause
equatorial Kelvin waves extremely thin ice clouds tropical tropopause
2008/11/13
A number of field-campaigns in the tropics have been conducted in recent years with two different LIDAR systems at Paramaribo (5.8° N, 55.2° W), Suriname. The lidars detect particles in the atmosphere...