Results 231 to 240 of about 81,183 (262)

Water Vapor: Observations of Galactic Sources

Science, 1969
We measured the emission of water vapor at a wavelength of 1.35 centimeters from nine sources with the 120-foot (36.5-meter) Haystack antenna. Eight sources lie within 30 seconds of arc of the hydroxyl sources of 18 centimeters but not all hydroxyl sources produced detectable emission of water vapor.
M L, Meeks, J C, Carter, A H, Barrett, P R, Schwartz, J W, Waters, W E, Brown   +5 more
openaire   +2 more sources

Operating a radio-frequency plasma source on water vapor

Review of Scientific Instruments, 2009
A magnetically enhanced radio-frequency (rf) plasma source operating on water vapor has an extensive list of potential applications. In this work, the use of a rf plasma source to dissociate water vapor for hydrogen production is investigated. This paper describes a rf plasma source operated on water vapor and characterizes its plasma properties using ...
Sonca V T, Nguyen, John E, Foster, Alec D, Gallimore   +2 more
openaire   +2 more sources

Water-vapor-based source of UV radiation

Technical Physics, 2010
The results of studying a capacitive discharge in water vapor are reported. This discharge is an effective and environmentally friendly source of UV radiation due to hydroxyl OH (A2Σ+ → X2Π transition) in the wavelength range 280–330 nm. It is shown that, at E/N 210 Td, ionization dominates over dissociation.
A. A. General, S. V. Avtaeva
openaire   +1 more source

Ultraviolet radiation sources on (H2O, D2O) water vapor

Technical Physics, 2009
Emission characteristics of ultraviolet (UV) radiation from water vapor (H2O, D2O, and a mixture of H2O and D2O vapors) excited by pulse-periodic discharges with open electrodes, as well as electrodes outside the discharge tube (capacitive discharge), are presented. Radiation is studied in a spectral range of 175–350 nm. The emission characteristics of
A. K. Shuaibov, A. A. Heneral, Yu. O. Shpenik, Yu. V. Zhmenyak, I. V. Shevera, R. V. Gritsak   +5 more
openaire   +1 more source

Design, Calibration and Implementation of a Biosynthetic Water Vapor Source

SAE Technical Paper Series, 1994
<div class="htmlview paragraph">In efforts to generate a modeling and simulation system for the environmental control and life support system for a small plant growth chamber, the requirement for a biosynthetic water vapor source was found.
A. L. Blackwell, S. Maa, S. Agelopoulos
openaire   +1 more source

Deuterium excess reveals diurnal sources of water vapor in forest air

Oecologia, 2010
An understanding of atmospheric water vapor content and its isotopic composition is important if we are to be able to model future water vapor dynamics and their potential feedback on future climate change. Here we present diurnal and vertical patterns of water isotope ratios in forest air (δ(2)H(v) and δ(18)O(v)) not observed previously.
Chun-Ta, Lai, James R, Ehleringer
openaire   +2 more sources

Analysis of water vapor sources and water vapor recycle rate in northwest China based on the LMDZ model

Isotopes in Environmental and Health Studies
This study spatially interpolates isotope data from nine stations in northwest China based on the LMDZ (Laboratoire de Météorologie Dynamique-Zoom) model, analyzes the contribution of different water vapor sources to precipitation in the region through a ternary mixing model, and simulates the trajectory of air mass transport in the region by combining
Tian, Yin, Fenli, Chen, Nan, Kang, Huizhen, Li, Xulin, Li, Shiyu, Wang   +5 more
openaire   +2 more sources

Remote sensing evidence for regolith water vapor sources on Mars

Journal of Geophysical Research: Solid Earth, 1982
A survey of ground‐based and spacecraft observations at visible wavelengths of condensate activity in the Martian atmosphere is presented. The observations reveal that Solis Lacus has been a center of condensate activity throughout the observational record, along with sites in Noachis‐Hellespontus and in border regions of Syrtis Major.
Robert L. Huguenin, Stephen M. Clifford
openaire   +1 more source

Sources of Intermodel Spread in the Lapse Rate and Water Vapor Feedbacks

Journal of Climate, 2018
AbstractSources of intermodel differences in the global lapse rate (LR) and water vapor (WV) feedbacks are assessed using CO2 forcing simulations from 28 general circulation models. Tropical surface warming leads to significant warming and moistening in the tropical and extratropical upper troposphere, signifying a nonlocal, tropical influence on ...
Stephen Po-Chedley, Kyle C. Armour, Cecilia M. Bitz, Mark D. Zelinka, Benjamin D. Santer, Qiang Fu   +5 more
openaire   +1 more source

Single Frequency Er:YAG methane/water vapor DIAL source

Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), 2018
Fibertek is developing Pound Drever Hall PDH injection locked, resonantly pumped Er:YAG laser systems for methane and water vapor differential absorption lidar (DIAL). We have achieved 6mJ at 1645nm and a spectral purity of 99.9%
Patrick M. Burns, Moran Chen, David Pachowicz, Slava Litvinovitch, Fran Fitzpatrick, Nicholas W. Sawruk   +5 more
openaire   +1 more source