Zobrazeno 1 - 10
of 1 343
pro vyhledávání: '"R. Kawa"'
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 1061-1074 (2024)
We measured the column-averaged atmospheric CO2 mixing ratio (XCO2) to a variety of cloud tops with an airborne pulsed multi-wavelength integrated path differential absorption (IPDA) lidar during NASA's 2017 ASCENDS/ABoVE airborne campaign. Measureme
Externí odkaz:
https://doaj.org/article/18ea13e7340647d0a3598ee033475fc3
Autor:
KAWA, S. R.1 stephan.r.kawa@nasa.gov, MAO, J.2, ABSHIRE, J. B.1, COLLATZ, G. J.1, SUN, X.1, WEAVER, C. J.2
Publikováno v:
Tellus: Series B. Nov2010, Vol. 62 Issue 5, p759-769. 11p. 2 Color Photographs, 1 Diagram, 1 Chart, 4 Graphs, 1 Map.
Publikováno v:
Earth System Science Data, Vol 14, Pp 3821-3833 (2022)
A series of attenuated atmospheric backscatter profiles were measured at 1572 nm by the CO2 Sounder lidar during the eight flights of the 2017 ASCENDS/ABoVE (Active Sensing of CO2 Emission over Nights, Days, and Seasons, Arctic Boreal Vulnerability E
Externí odkaz:
https://doaj.org/article/dadc8045cdd04770ae6aaa3e85b5d79b
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 9609-9628 (2021)
The ability to monitor and understand natural and anthropogenic variability in atmospheric carbon dioxide (CO2) is a growing need of many stakeholders across the world. Systems that assimilate satellite observations, given their short latency and den
Externí odkaz:
https://doaj.org/article/d8ed6e92e619490d84c251870186e052
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 3909-3922 (2021)
The retrieval algorithm for CO2 column mixing ratio from measurements of a pulsed multi-wavelength integrated path differential absorption (IPDA) lidar is described. The lidar samples the shape of the 1572.33 nm CO2 absorption line at multiple wavele
Externí odkaz:
https://doaj.org/article/99a74abd12fe4c77bd3cdc4b26008484
Autor:
Jianping Mao, James B. Abshire, Stephan R. Kawa, Haris Riris, Xiaoli Sun, Niels Andela, Paul T. Kolbeck
Publikováno v:
Geophysical Research Letters, Vol 48, Iss 16, Pp n/a-n/a (2021)
Abstract During the summer 2017 ASCENDS/ABoVE airborne science campaign, the NASA Goddard CO2 Sounder lidar overflew smoke plumes from wildfires in the British Columbia, Canada. In the flight path over Vancouver Island on 8 August 2017, the column XC
Externí odkaz:
https://doaj.org/article/f1734abdb4da4b348ccaeade337c5d76
Autor:
J. S. Wang, S. R. Kawa, G. J. Collatz, M. Sasakawa, L. V. Gatti, T. Machida, Y. Liu, M. E. Manyin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 11097-11124 (2018)
The precise contribution of the two major sinks for anthropogenic CO2 emissions, terrestrial vegetation and the ocean, and their location and year-to-year variability are not well understood. Top-down estimates of the spatiotemporal variations in
Externí odkaz:
https://doaj.org/article/b37626411b044c61a3b763c92508bce6
Autor:
J. B. Abshire, A. K. Ramanathan, H. Riris, G. R. Allan, X. Sun, W. E. Hasselbrack, J. Mao, S. Wu, J. Chen, K. Numata, S. R. Kawa, M. Y. M. Yang, J. DiGangi
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 2001-2025 (2018)
Here we report on measurements made with an improved CO2 Sounder lidar during the ASCENDS 2014 and 2016 airborne campaigns. The changes made to the 2011 version of the lidar included incorporating a rapidly wavelength-tunable, step-locked seed lase
Externí odkaz:
https://doaj.org/article/52ad19bc425c4fa4bfecbc8b071f5c71
Autor:
G. M. Wolfe, S. R. Kawa, T. F. Hanisco, R. A. Hannun, P. A. Newman, A. Swanson, S. Bailey, J. Barrick, K. L. Thornhill, G. Diskin, J. DiGangi, J. B. Nowak, C. Sorenson, G. Bland, J. K. Yungel, C. A. Swenson
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 1757-1776 (2018)
The exchange of trace gases between the Earth's surface and atmosphere strongly influences atmospheric composition. Airborne eddy covariance can quantify surface fluxes at local to regional scales (1–1000 km), potentially helping to bridge gaps b
Externí odkaz:
https://doaj.org/article/1b98d019ee2e43c7ab1b25f8240d2884
Autor:
J. Mao, A. Ramanathan, J. B. Abshire, S. R. Kawa, H. Riris, G. R. Allan, M. Rodriguez, W. E. Hasselbrack, X. Sun, K. Numata, J. Chen, Y. Choi, M. Y. M. Yang
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 127-140 (2018)
We have measured the column-averaged atmospheric CO2 mixing ratio to a variety of cloud tops by using an airborne pulsed multi-wavelength integrated-path differential absorption (IPDA) lidar. Airborne measurements were made at altitudes up to 13 k
Externí odkaz:
https://doaj.org/article/2024ec8907584f298fe23b498f8b368b