Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Ranjit Bahadur"'
Autor:
Nithya Ramanathan, Abhishek Kar, Veerabhadran Ramanathan, S. N. Tripathi, Eric Graham, I. H. Rehman, A. Misra, Ranjit Bahadur, Lokendra Singh, O. Patange
Publikováno v:
Environmental Science & Technology. 49:4749-4756
Deployment of improved biomass burning cookstoves is recognized as a black carbon (BC) mitigation measure that has the potential to achieve health benefits and climate cobenefits. Yet, few field based studies document BC concentration reductions (and
Autor:
Beat Schmid, Veerabhadran Ramanathan, Kaitlyn J. Suski, Duli Chand, John F. Cahill, Alberto Cazorla, Kimberly A. Prather, Ranjit Bahadur
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 18, Pp 9337-9350 (2013)
Estimating the aerosol contribution to the global or regional radiative forcing can take advantage of the relationship between the spectral aerosol optical properties and the size and chemical composition of aerosol. Long term global optical measurem
Publikováno v:
Proceedings of the National Academy of Sciences. 109:17366-17371
Black carbon (BC) is functionally defined as the absorbing component of atmospheric total carbonaceous aerosols (TC) and is typically dominated by soot-like elemental carbon (EC). However, organic carbon (OC) has also been shown to absorb strongly at
Publikováno v:
Proceedings of the National Academy of Sciences. 108:3516-3521
Measurements of submicron particles by Fourier transform infrared spectroscopy in 14 campaigns in North America, Asia, South America, and Europe were used to identify characteristic organic functional group compositions of fuel combustion, terrestria
Publikováno v:
Atmospheric Environment. 45:1162-1167
We examine the temporal and the spatial trends in the concentrations of black carbon (BC) – recorded by the IMPROVE monitoring network for the past 20 years – in California. Annual average BC concentrations in California have decreased by about 5
Publikováno v:
Aerosol Science and Technology. 44:551-562
Complementary single particle measurements of organic aerosols using aerosol time-of-flight mass spectrometry (ATOFMS) and Scanning Transmission X-ray Microscopy—Near Edge X-ray Absorption Fine Structure (STXM-NEXAFS) are compared to examine the re
Autor:
T. S. Bates, Lynn M. Russell, Allen H. Goldstein, Steven S. Cliff, Ranjit Bahadur, Timothy Uplinger, Barkley C. Sive, Dylan B. Millet
Publikováno v:
Environmental Science & Technology. 44:2542-2548
Atmospheric particles collected during the ICARTT 2004 field experiment at ground based sites at Appledore Island (AI), New Hampshire, Chebogue Point (CP), Nova Scotia, and aboard the R/V Ronald Brown (RB) were analyzed using Fourier transform infrar
Autor:
Patricia K. Quinn, James Allan, Lynn M. Russell, L. N. Hawkins, Timothy S. Bates, Ranjit Bahadur, Darrel Baumgardner
Publikováno v:
Atmospheric Environment. 43:6100-6105
Organic aerosol chemical markers from normalized concentrations of independent measurements of mass fragments (using Aerosol Mass Spectrometry, AMS) are compared to bond-based functional groups (from Fourier Transform Infrared spectroscopy, FTIR) dur
Publikováno v:
Atmospheric Environment. 43:1591-1602
In this work we have compared ground-based measurements of organic carbon (OC) in the fine aerosol (PM2.5) fraction that are reported in peer-reviewed publications as part of both short campaigns and continuous monitoring networks. The comparison pro
Autor:
Ranjit Bahadur, Lynn M. Russell
Publikováno v:
Aerosol Science and Technology. 42:369-376
The deliquescence of sodium chloride is size dependent for particles smaller than 100 nm, with some discrepancies between measured and predicted deliquescence relative humidity as a function of size. Two sources of uncertainty in current models are t