搜索结果: 1-15 共查到“大气科学 a boreal forest”相关记录22条 . 查询时间(0.046 秒)
Tree species influence boreal forest fire behavior and subsequent effects on climate
Tree species boreal forest fire on climate
2015/3/4
For a better understanding of how forest fires behave and interact with climate, scientists are turning to the trees. A new study out of UC Irvine shows that differences in individual tree species bet...
Composition and temporal behavior of ambient ions in the boreal forest
ambient ions the boreal forest
2010/9/21
A recently developed atmospheric pressure interface mass spectrometer (APi-TOF) measured the negative and positive ambient ion composition at a boreal forest site. As observed in previous studies, the...
Nanoparticles in boreal forest and coastal environment: a comparison of observations and implications of the nucleation mechanism
Nanoparticles boreal forest coastal environment the nucleation mechanism
2010/8/16
The detailed mechanism of secondary new particle formation in the atmosphere is still under debate. It is proposed that particle formation happens via activation of 1–2 nm atmospheric neutral molecula...
Effects of lightning and other meteorological factors on fire activity in the North American boreal forest: implications for fire weather forecasting
meteorological factors fire activity the North American boreal forest fire weather forecasting
2010/8/16
The effects of lightning and other meteorological factors on wildfire activity in the North American boreal forest are statistically analyzed during the fire seasons of 2000–2006 through an integratio...
Factors influencing the contribution of ion-induced nucleation in a boreal forest, Finland
ion-induced nucleation a boreal forest Finland
2010/8/12
We present the longest series of measurements so far (2 years and 7 months) made with an Ion-DMPS at the SMEAR II measurement station in Hyytiälä, Southern Finland. We show that the classifi...
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...
Sulfuric acid and OH concentrations in a boreal forest site
Sulfuric acid OH concentrations boreal forest site
2009/10/9
As demonstrated in a number of investigations, gaseous sulfuric acid plays a central role in atmospheric aerosol formation. Using chemical ionization mass spectrometer the gas-phase sulfuric acid and ...
Day-time concentrations of biogenic volatile organic compounds in a boreal forest canopy and their relation to environmental and biological factors
Day-time concentrations biogenic volatile organic compounds boreal forest canopy environmental and biological factors
2009/8/7
Atmospheric concentrations of methanol, acetaldehyde, acetone, isoprene and monoterpenes were measured using PTR-MS (proton transfer reaction mass spectrometry) in a boreal forest site in Hyytiäl...
Analysis of atmospheric neutral and charged molecular clusters in boreal forest using pulse-height CPC
atmospheric neutral molecular clusters boreal forest pulse-height CPC
2009/7/1
We measured the size distribution of atmospheric neutral and charged clusters and particles down to mobility diameter around 1.5 nm by applying pulse-height CPC technique at SMEAR II station in Hyyti&...
Applying the Condensation Particle Counter Battery（CPCB）——to study the water-affinity of freshly-formed 2–9 nm particles in boreal forest
CPCB water-affinity freshly-formed 2–9 nm particles boreal forest
2009/6/2
Measurements on the composition of nanometer-sized atmospheric particles are the key to understand which vapors participate in the secondary aerosol formation processes. Knowledge on these processes i...
Airborne measurements of nucleation mode particles II: boreal forest nucleation events
Airborne measurements nucleation mode particles boreal forest nucleation events
2009/3/13
Airborne measurements of nucleation mode aerosol concentrations during nucleation events over the boreal forest of southern Finland are reported. Three case studies are analyzed in an attempt to chara...
Kinetic nucleation and ions in boreal forest particle formation events
Kinetic nucleation ions boreal forest particle
2009/3/10
In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic mo...
Ion production rate in a boreal forest based on ion, particle and radiation measurements
Ion production rate boreal forest ion particle radiation
2009/3/6
In this study the ion production rates in a boreal forest were studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon concentra...
Boreal forest fires in 1997 and 1998：a seasonal comparison using transport model simulations and measurement data
Boreal forest fires seasonal comparison transport model
2009/3/6
Forest fire emissions have a strong impact on the concentrations of trace gases and aerosols in the atmosphere. In order to quantify the influence of boreal forest fire emissions on the atmospheric co...
Tethered balloon measurements of biogenic volatile organic compounds at a Boreal forest site
Tethered balloon biogenic volatile organic compounds Boreal forest site
2009/2/20
Measurements of biogenic volatile organic compounds (VOCs) were performed at Hyytiälä, a Boreal forest site in Southern Finland as part of the OSOA (origin and formation of secondary organic...