Sentences with phrase «drifting measurement times»

They state on their website that the data suffers problems «with the adjustment for drifting measurement times» and «should be used with caution».

Recently one of the groups, RSS (which is the one used by David Rose in the Mail on Sunday article) identified an error in their record due to drifting measurement times that has been affecting observations in recent years.

Not exact matches

While there remain disparities among different tropospheric temperature trends estimated from satellite Microwave Sounding Unit (MSU and advanced MSU) measurements since 1979, and all likely still contain residual errors, estimates have been substantially improved (and data set differences reduced) through adjustments for issues of changing satellites, orbit decay and drift in local crossing time (i.e., diurnal cycle effects).

While there remain disparities among different tropospheric temperature trends estimated from satellite Microwave Sounding Unit (MSU and advanced MSU) measurements since 1979, and all likely still contain residual errors, estimates have been substantially improved (and data set differences reduced) through adjustments for issues of changing satellites, orbit decay and drift in local crossing time (i.e., diurnal cycle effects).

Temperatures aloft can be measured in a number of ways, two of which are useful for climate monitoring: by radiosondes (balloon - borne instrument packages, including thermometers, released daily or twice daily at a network of observing stations throughout the world), and by satellite measurements of microwave radiation emitted by oxygen gas in the lower to mid-troposphere, taken with an instrument known as the Microwave Sounding Unit (MSU).5 The balloon measurements are taken at the same Greenwich mean times each day, whereas the times of day of the satellite measurements for a given location drift slowly with changes in the satellite orbits.

The radiosondes would provide a check for accuracy / drift of the satellite measurements over time and to provide a solid overlap when calibrating a new satellite or instrument..

Previous versions of the RSS dataset have used a diurnal climatology derived from general circulation model output to remove the effects of drifting local measurement time.

Mears and Wentz 2005 found that UAH didn't account for drifts in the time of measurement each day, which resulted in a spurious cooling trend.

Massive Arctic ice island drifting toward shipping lanes The biggest Arctic «ice island» to form in nearly 50 years — a 250 - square - kilometer behemoth described as four times the size of Manhattan — has been discovered after a Canadian scientist scanning satellite images of northwest Greenland spotted a giant break in the famed Petermann Glacier.Canada.com — Aug 07 10:16 am In another research, using Autosub, an autonomous underwater vehicle, researchers led by the British Antarctic Survey have captured ocean and sea - floor measurements, which revealed a 300 meter high ridge on the sea floor.