نتایج جستجو برای: water vapour

تعداد نتایج: 556568  

2004
M. Collins

There is an ongoing important debate about the role of water vapour in climate change. Predictions of future climate change depend strongly on the magnitude of the water vapour feedback and until now models have almost exclusively been relied upon to quantify this feedback. In this work we employ observations of water vapour changes, together with detailed radiative calculations to estimate the...

2017
Hayder Al-Madhhachi Matthew Phillips

In this study, mathematical calculations developed through water-vapour phase-change theory is used to interpret the processes involved in the fresh water production of a thermoelectric distillation system. The rate of water production depends on various parameters of vaporization phenomena such as water and vapour temperatures, pressure, specific volume, heat capacity and water-vapour surface ...

2004
Stefan Noël Michael Buchwitz Heinrich Bovensmann John P. Burrows

Measurements of the SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) on ENVISAT have been used to derive global water vapour total column amounts over ocean and land. For this purpose, the Air Mass Corrected Differential Optical Absorption Spectroscopy (AMC-DOAS) approach, which has already been successfully used with GOME data, has been applied to SCIAMACHY’s n...

2013
P. Xia C. Cai

Traditionally, balloon-based radiosonde soundings are used to study the spatial distribution of atmospheric water vapour. However, this approach cannot be frequently employed due to its high cost. In contrast, GPS tomography technique can obtain water vapour in a high temporal resolution. In the tomography technique, an iterative or non-iterative reconstruction algorithm is usually utilised to ...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2012
Eli J Mlawer Vivienne H Payne Jean-Luc Moncet Jennifer S Delamere Matthew J Alvarado David C Tobin

Water vapour continuum absorption is an important contributor to the Earth's radiative cooling and energy balance. Here, we describe the development and status of the MT_CKD (MlawerTobinCloughKneizysDavies) water vapour continuum absorption model. The perspective adopted in developing the MT_CKD model has been to constrain the model so that it is consistent with quality analyses of spectral atm...

Journal: :Canadian Anaesthetists' Society journal 1979
J Chalon M Ali S Ramanathan H Turndorf

THiS REV,EW studies the humidi ty output of anaesthet ic sys tems in common use and the steps taken to improve them. The amount of water vapour which an a tmosphere can hold varies with temperature . The warmer the ambient gas mixture, the more water vapour it can contain. There is a max imum amount of water vapour which the a tmosphere can maintain at each tempera ture when it becomes saturate...

2007
Stewart Wuest

The assumption that seeds imbibe most of the water required for germination as liquid through seed-to-soil contact has been a dominant theme in germination research and seeding technology. Under most conditions, seeds are also exposed to water vapour during imbibition, but the relative contributions of liquid and vapour are difficult to assess. In water uptake models that include vapour, proced...

1999
GABRIEL G. KATUL CHENG-I HSIEH

Atmospheric surface layer (ASL) experiments over the past 10 years demonstrate that the flux-variance similarity functions for water vapour are consistently larger in magnitude than their temperature counterpart. In addition, latent heat flux calculations using the flux-variance method do not compare as favorably to eddy-correlation measurements when compared to their sensible heat counterpart....

2012
Z. Pavlík J. Žumár M. Pavlíková

Water vapour transport properties of gypsum block are studied in dependence on relative humidity using inverse analysis based on genetic algorithm. The computational inverse analysis is performed for the relative humidity profiles measured along the longitudinal axis of a rod sample. Within the performed transient experiment, the studied sample is exposed to two environments with different rela...

2015
B. Tschanz N. Kämpfer

The ground-based microwave radiometer MIAWARA-C recorded the upper stratospheric and lower mesospheric water vapour distribution continuously from June 2011 to March 2013 above the Arctic station of Sodankylä, Finland (67.4 N, 26.6 E) without major interruptions and offers water vapour profiles with temporal resolution of 1 h for average conditions. The water vapour time series of MIAWARA-C sho...

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