|
Post by numerouno on Aug 20, 2013 20:53:16 GMT
Simply put the specific heat of air - known as 'enthalpy' - varies considerably with its humidity. This means that a kilogram of humid air needs significantly more heat measured in kilojoules - to be raised one degree than does dry air. Atmospheric temperature is not therefore a measure of atmospheric heat content. So what if it varies? Where does the energy then go hiding from your moist, or even past-saturated, air?
|
|
|
Post by sigurdur on Aug 20, 2013 22:36:42 GMT
It doesn't have to hide as it was never there.
|
|
|
Post by sigurdur on Aug 21, 2013 0:05:36 GMT
|
|
|
Post by sigurdur on Aug 21, 2013 0:11:12 GMT
|
|
|
Post by numerouno on Aug 21, 2013 5:09:19 GMT
It doesn't have to hide as it was never there. Sigurdur, you make no sense. The heat content of the tropical air, and the surplus of energy, drives the whole climatic system, along with the tropical waters.
|
|
|
Post by Andrew on Aug 21, 2013 5:40:18 GMT
It doesn't have to hide as it was never there. Sigurdur, you make no sense. The heat content of the tropical air, and the surplus of energy, drives the whole climatic system, along with the tropical waters. How do you know the heat content is different if you never measured the heat content in the past? All we have a record of is temperature but this is not a measure of heat content. Heat content is the more important thing to know about.
|
|
|
Post by numerouno on Aug 21, 2013 5:48:48 GMT
Sigurdur, you make no sense. The heat content of the tropical air, and the surplus of energy, drives the whole climatic system, along with the tropical waters. How do you know the heat content is different if you never measured the heat content in the past? All we have a record of is temperature but this is not a measure of heat content. Heat content is the more important thing to know about. Ok, we will have to live with that then.
|
|
|
Post by sigurdur on Mar 1, 2014 18:17:59 GMT
www.friendsofscience.org/assets/documents/NVAP_March2013.pdfIt is very hard to quantify water vapor in the atmosphere. Its concentration changes continually with time, location and altitude. To measure it at the same location every day, you would need a hygrometer, which in earlier days made use of the moisture-sensitivity of a hair, and by now of for instance condensators. A vertical profile is obtained with a weather balloon. To get a global overview, only satellite measurements are suitable. From a satellite, the absorption of the reflecting sunlight due to water vapor molecules is measured. The results are pictures of global water vapor distributions and their changes. The measurement error, however, is still about 30 to 40%. www.espere.net/Unitedkingdom/water/uk_measurement.html
|
|
|
Post by sigurdur on Mar 1, 2014 18:46:22 GMT
onlinelibrary.wiley.com/doi/10.1029/2012GL052094/abstract[1] The NASA Water Vapor Project (NVAP) dataset is a global (land and ocean) water vapor dataset created by merging multiple sources of atmospheric water vapor to form a global data base of total and layered precipitable water vapor. Under the NASA Making Earth Science Data Records for Research Environments (MEaSUREs) program, NVAP is being reprocessed and extended, increasing its 14-year coverage to include 22 years of data. The NVAP-MEaSUREs (NVAP-M) dataset is geared towards varied user needs, and biases in the original dataset caused by algorithm and input changes were removed. This is accomplished by relying on peer reviewed algorithms and producing the data in multiple “streams” to create products geared towards studies of both climate and weather. We briefly discuss the need for reprocessing and extension, steps taken to improve the product, and provide some early science results highlighting the improvements and potential scientific uses of NVAP-M.
|
|
|
Post by nautonnier on Mar 2, 2014 14:05:21 GMT
|
|
|
Post by sigurdur on Mar 11, 2014 19:14:38 GMT
Thanks. Looks like an interesting paper.
|
|
|
Post by sigurdur on Mar 11, 2014 19:14:53 GMT
Thanks. Looks like an interesting paper.
|
|
|
Post by sigurdur on Mar 13, 2014 19:28:26 GMT
www.leif.org/EOS/2012GL052094-pip.pdfAbstract The NASA Water Vapor Project (NVAP) dataset is a global (land and ocean) water vapor dataset created by merging multiple sources of atm ospheric water vapor to form a global data base of total and layered precipitable water vapor. Under the NASA Making Earth Science Data Records for Research Environments (MEaSUREs) program, NVAP is being reprocessed and extended, increasing it s 14 - year cov erage to include 22 years of data. The NVAP - MEaSUREs (NVAP - M) dataset is geared towards varied user
|
|
|
Post by sigurdur on Mar 13, 2014 19:29:06 GMT
The paper is an interesting paper. Sorry for the abstract looking funny, but it is in pdf format and the copy thing didn't work too well.
|
|
|
Post by karlox on Mar 14, 2014 9:10:28 GMT
Abstract The NASA Water Vapor Project (NVAP) dataset is a global (land and ocean) water vapor dataset created by merging multiple sources of atmospheric water vapor to form a global data base of total and layered precipitable water vapor. Under the NASA Making Earth Science Data Records for Research Environments (MEaSUREs) program, NVAP is being reprocessed and extended, increasing its 14-year coverage to include 22 years of data. The NVAP-MEaSUREs (NVAP-M) dataset is geared towards varied user needs, and biases in the original dataset caused by algorithm and input changes were removed. This is accomplished by relying on peer reviewed algorithms and producing the data in multiple “streams” to create products geared towards studies of both climate and weather. We briefly discuss the need for reprocessing and extension, steps taken to improve the product, and provide some early science results highlighting the improvements and potential scientific uses of NVAP-M.
|
|