Hi Rudy et al:
Good article about understanding humidity, http://www.usatoday.com/weather/resources/askjack/2002-12-01-answers-dp-relhum_x.htm
` Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of R Sedlak
Sent: Thursday, June 01, 2006 3:45 PM
To: [log in to unmask]
Subject: [TN] Humidity?
Unclear how much time you have spent near the equator....
But, I suspect not a whole lot....
Humidity far in excess of 100% is common... or at least it feels that way.
I have experience periods in excess of 5 years, this in less than a month, where the temperature sometimes fell to 30 C, but the REPORTED humidity was never below 90%....
It makes you understand why suicide bombers may just be seeking some relief.
Rudy Sedlak
Brian Ellis <[log in to unmask]> wrote: I have discovered that there is a real limit to the conditions of natural temperature and humidity that are possible. To put it simply, if the temperature and humidity are high at ground level, clouds will form at a given altitude, reflecting solar radiation. This will result in a lowering of the temperature. I haven't yet determined the exact limit conditions, but it would seem that (very roughly), you can obtain 100% RH only if the temperature is under about 15°C. At 25°C, the max humidity is ~85%. At 35°C, 75%. At 50°C, 55%.
When I have more exact data, it is clear I'll be able to determine a limit curve, on the right side of which it will be impossible for natural conditions to exist. However, we can create conditions in climatic chambers which will be far to the right of the curve, and we use such conditions in SIR/ECMR testing. Are we exaggerating when we pump up the temperature and humidity to excessive levels, to create conditions which can never occur in real life? Is there even a rationale to do so? Remember that the inside of an enclosure with active electronics is warmer than ambient. The real dangerous conditions are with high humidities, which can occur only at artificially low temperatures, such as when going into a tropical rain forest conditions from an over-air-conditioned room (e.g., 20°C to 30°C/80% RH), when condensation may occur for a short time.
Views are welcome, please.
Brian
--
http://www.cypenv.org Cyprus environment/energy http://www.cypenv.org/worldenv World environment/energy http://www.cypenv.org/weather Cyprus weather http://www.cypenv.org/smf/index.php Environment/energy forums http://groups.yahoo.com/group/cypnature/ Cyprus nature forum
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
http://mail.yahoo.com
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
