Results 11 to 20 of about 5,576 (50)

Field assessments on the impact of CO₂ concentration fluctuations along with complex-terrain flows on the estimation of the net ecosystem exchange of temperate forests [PDF]

Atmospheric Measurement Techniques
CO2 storage (Fs) is the cumulation or depletion in CO2 amount over a period in an ecosystem. Along with the eddy covariance flux and wind-stream advection of CO2, it is a major term in the net ecosystem CO2 exchange (NEE) equation.
D. Teng, D. Teng, J. Zhu, J. Zhu, J. Zhu, T. Gao, T. Gao, T. Gao, F. Yu, F. Yu, Y. Zhu, Y. Zhu, X. Zhou, X. Zhou, B. Yang   +14 more
doaj   +1 more source

Retrieval of pseudo-BRDF-adjusted surface reflectance at 440 nm from the Geostationary Environmental Monitoring Spectrometer (GEMS) [PDF]

Atmospheric Measurement Techniques
In satellite remote sensing applications, enhancing the precision of level 2 (L2) algorithms relies heavily on the accurate estimation of the surface reflectance across the ultraviolet (UV) to visible (VIS) spectrum.
S. Sim, S. Choi, D. Jung, J. Woo, N. Kim, S. Park, H. Kim, U. Jeong, H. Hong, K.-S. Han   +9 more
doaj   +1 more source

UAV-based in situ measurements of CO₂ and CH₄ fluxes over complex natural ecosystems [PDF]

Atmospheric Measurement Techniques
This study presents an unoccupied aerial vehicle (UAV) platform used to resolve horizontal and vertical patterns of CO2 and CH4 mole fractions within the lower part of the atmospheric boundary layer. The obtained data contribute important information for
A. Bolek, M. Heimann, M. Heimann, M. Göckede   +3 more
doaj   +1 more source

A versatile water vapor generation module for vapor isotope calibration and liquid isotope measurements [PDF]

Atmospheric Measurement Techniques
A versatile vapor generation module has been developed for both field-based water vapor isotope calibrations and laboratory-based liquid water isotope measurements.
H. C. Steen-Larsen, D. Zannoni, D. Zannoni   +2 more
doaj   +1 more source

A new software toolkit for optical apportionment of carbonaceous aerosol [PDF]

Atmospheric Measurement Techniques
Instruments measuring aerosol light absorption, such as the Aethalometer and the Multi-Wavelength Absorbance Analyzer (MWAA), have been extensively used to characterize optical absorption of atmospheric particulate matter.
T. Isolabella, T. Isolabella, V. Bernardoni, V. Bernardoni, A. Bigi, M. Brunoldi, M. Brunoldi, F. Mazzei, F. Mazzei, F. Parodi, P. Prati, P. Prati, V. Vernocchi, D. Massabò, D. Massabò   +14 more
doaj   +1 more source

Global evaluation of fast radiative transfer model coefficients for early meteorological satellite sensors [PDF]

Atmospheric Measurement Techniques
RTTOV (the Radiative Transfer for TOVS code, where TOVS is the TIROS Operational Vertical Sounder) coefficients are evaluated using a large, independent dataset of 25 000 atmospheric model profiles as a robust test of the diverse 83 training profiles ...
B. B. Silveira, B. B. Silveira, E. C. Turner, J. Vidot   +3 more
doaj   +1 more source

Long-term aerosol particle depolarization ratio measurements with HALO Photonics Doppler lidar [PDF]

Atmospheric Measurement Techniques
It has been demonstrated that HALO Photonics Doppler lidars (denoted HALO Doppler lidar hereafter) have the capability for retrieving the aerosol particle depolarization ratio at a wavelength of 1565 nm.
V. Le, H. Lobo, E. J. O'Connor, V. Vakkari, V. Vakkari   +4 more
doaj   +1 more source

Geometrical and optical properties of cirrus clouds in Barcelona, Spain: analysis with the two-way transmittance method of 4 years of lidar measurements [PDF]

Atmospheric Measurement Techniques
In this paper a statistical study of cirrus geometrical and optical properties based on 4 years of continuous ground-based lidar measurements with the Barcelona (Spain) Micro Pulse Lidar (MPL) is analysed. First, a review of the literature on the two-way
C. Gil-Díaz, M. Sicard, M. Sicard, M. Sicard, A. Comerón, D. C. F. dos Santos Oliveira, C. Muñoz-Porcar, A. Rodríguez-Gómez, J. R. Lewis, E. J. Welton, S. Lolli, S. Lolli   +11 more
doaj   +1 more source

First evaluation of the GEMS glyoxal products against TROPOMI and ground-based measurements [PDF]

Atmospheric Measurement Techniques
The Geostationary Environment Monitoring Spectrometer (GEMS) on board the GEO-KOMPSAT-2B satellite is the first geostationary satellite launched to monitor the environment.
E. S. Ha, R. J. Park, H.-A. Kwon, G. T. Lee, S. D. Lee, S. Shin, D.-W. Lee, H. Hong, C. Lerot, C. Lerot, I. De Smedt, T. Danckaert, F. Hendrick, H. Irie   +13 more
doaj   +1 more source

Spatial analysis of PM_2.5 using a concentration similarity index applied to air quality sensor networks [PDF]

Atmospheric Measurement Techniques
Air quality sensor (AQS) networks are useful for mapping PM2.5 (particles with a diameter of 2.5 µm or smaller) in urban environments, but quantitative assessment of the observed spatial and temporal variation is currently underdeveloped.
R. Byrne, R. Byrne, J. C. Wenger, J. C. Wenger, S. Hellebust, S. Hellebust   +5 more
doaj   +1 more source