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Post by duwayne on Jun 5, 2015 14:03:04 GMT
The satellite measurements cover all the earth's surface and, as far as I am aware, are not subject to human error. The satellites still have to be calibrated using objects on Earth that are of a uniform nature..... Andrew, do you have any references that support this statement?
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Post by nautonnier on Jun 5, 2015 15:24:25 GMT
calibration“Only some of the radiometers need hot load thermal gradient corrections. The determination of TB from counts for microwave radiometers is completed using two known temperatures to infer the Earth scene temperature. For each scan, the antenna feedhorns view a mirror that reflects cold space (a known temperature of 2.7 K) and a hot absorber measured by several thermistors. Assuming a linear response, the Earth scene temperatures are then determined by fitting a slope to these two known measurements (hot and cold). This 2-point calibration system continuously compensates for variations in the radiometer gain and noise temperatures. This seemingly simple calibration methodology is fraught with subtle difficulties. The cold mirror is relatively trouble-free as long we note when the moon intrudes on the cold space view and remove moon-affected values. The hot absorber has been more problematic. The thermistors often do not adequately measure thermal gradients across the hot absorber. For example, a hot load correction is required for AMSR-E because of a design flaw in the AMSR-E hot load. The hot load acts as a blackbody emitter and its temperature is measured by precision thermistors. Unfortunately, during the course of an orbit, large thermal gradients develop within the hot load due to solar heating making it difficult to determine the average effective temperature from the thermistor readings. The thermistors themselves measure these gradients and may vary by up to 15 K. Several other radiometers have had similar, but smaller, issues.”
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Post by Andrew on Jun 5, 2015 16:57:34 GMT
The satellites still have to be calibrated using objects on Earth that are of a uniform nature..... Andrew, do you have any references that support this statement? I spent about 30 minutes looking for something to support what i said and it appears i was muddled up.
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Post by Ratty on Jun 5, 2015 22:54:08 GMT
Andrew, try finding the contiguous records for the vast majority of Aussie sites. Come back to me. You can start here: BOM Climate Data OnlineI went to St kilda SA. No problems there for all the ones i clicked on. did not bother to check further I neglected to include the words "long term" ..... How many of the stations listed under St Kilda SA had long term contiguous data? For example, Mt Barker goes back to the 1860s but there is a forty year gap. The rest of the stations are a mess or have relatively recent data. The same pattern repeats for almost any St Kilda SA area you might like to select. Capital cities are OK for the most part and there are a few rural stations (eg Cape Otway and Coonabarabran) that have long term contiguous recording. It's a travesty.
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Post by Andrew on Jun 6, 2015 0:20:52 GMT
I went to St kilda SA. No problems there for all the ones i clicked on. did not bother to check further I neglected to include the words "long term" ..... How many of the stations listed under St Kilda SA had long term contiguous data? For example, Mt Barker goes back to the 1860s but there is a forty year gap. The rest of the stations are a mess or have relatively recent data. The same pattern repeats for almost any St Kilda SA area you might like to select. Capital cities are OK for the most part and there are a few rural stations (eg Cape Otway and Coonabarabran) that have long term contiguous recording. It's a travesty. The first time i did this for st kilda I did not select temperature. With temperature selected For Mt Barker I only get data since about 1957. What does it all mean? I have no idea. If you click here: www.bom.gov.au/climate/averages/tables/cw_023733_All.shtml I can see the years 1888 to 1925 are not available. wattsupwiththat.com/2011/02/21/an-analysis-of-australian-rural-vs-non-rural-stations-temperature-trends/ Here data is claimed to be available from 1907 Searching on 'missing mt barker temperature data' I cannot find anybody claiming abnormalities.
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Post by sigurdur on Jun 28, 2015 3:38:51 GMT
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Post by sigurdur on Jul 6, 2015 14:34:25 GMT
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Post by phydeaux2363 on Jul 6, 2015 20:19:46 GMT
Ouch. my town number 1!! Oh well, off to the Hermes Bar! Better enjoy this place whilst I can!
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Post by Ratty on Jul 7, 2015 0:17:13 GMT
Ouch. my town number 1!! Oh well, off to the Hermes Bar! Better enjoy this place whilst I can! Quick! Send me that QANTAS ticket .....
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Post by sigurdur on Jul 9, 2015 18:59:11 GMT
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Post by sigurdur on Jul 13, 2015 4:25:30 GMT
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Post by sigurdur on Jul 16, 2015 14:11:09 GMT
OSLO - Governments should treat climate change as seriously as threats to national security or public health, partly by focusing more on the worst scenarios of rising temperatures, an international report said on Monday. Recommended for you Prevent nutrient deficiencies before they're visible Rodeo celebrates milestone year this summer Start planning now if summer looks dry Crop failures, extreme heat waves or high rates of sea level rise could be so harmful that governments should examine even small chances of the most severe impacts, according to the study by about 60 experts from 11 nations. www.agweek.com/news/weather/3798437-report-treat-climate-change-seriously-national-security
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Post by sigurdur on Jul 16, 2015 16:13:49 GMT
Unhappy Hump day it seems???.
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Post by sigurdur on Jul 16, 2015 16:14:40 GMT
Speaking from experience, one respects a horses bite. And makes sure it doesn't happen more than once, cause it really hurts.
Imagine a camel isn't a whole lot different.
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Post by sigurdur on Jul 25, 2015 3:45:07 GMT
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