Sentences with phrase «global measurement sites»

Trude Storelvmo of Yale University and her colleagues did not use climate models to find out the answer, but they based their calculations on temperature and solar radiation records taken from more than thousands of global measurement sites over the course of 46 years.

Not exact matches

The fall of 2015 could be the last time the reading dipped below that mark at Mauna Loa — which has become a kind of global bellwether as the first place where CO2 concentrations were actively monitored — and, perhaps, at the 12 other sites where Keeling's program now makes the same measurements from the Arctic to the Antarctic.

For example, previous global initiatives include satellite - based chlorophyll measurements, the Census of Marine Life, long - term observation sites, and arrays of remote sensors on floats that provide physical, chemical, and biological data [15].

The measurement sites have contributed to numerous European and global research programs and research infrastructures.

ssABE allows the global identification of palmitoylation sites as well as measurement of the active site modification state of PATs, enabling palmitoylation to be studied at a systems level.

(Actually, there are measurements at some sites before 1861, but this date is generally chosen as the first time when there is a dense enough network of data available to make a global average meaningful).

In 2010, a study using GRACE and Global Positioning System (GPS) measurements from three long - term sites on bedrock near the ice sheet found that the ice loss already documented over southern Greenland was spreading along the northwestern coast.

The paper is based on an analysis of global methane emissions examining almost 20,000 field data measurements collected from 70 sites across Arctic, temperate and tropical regions.

So the claim is that one can reconstruct, to within + / - 0.2 C, what the so - called «global average temperature» was 2000 years ago using proxy measurements from only 73 sites?

Started reading about «global temperature measurement», leading to Anthony Watts and the global thermometer siting scandal.

The reference network consists of in - situ measurements at observatories and tall towers, and air samples collected at global surface sites and aboard small aircraft.

To point out just a couple of things: — oceans warming slower (or cooling slower) than lands on long - time trends is absolutely normal, because water is more difficult both to warm or to cool (I mean, we require both a bigger heat flow and more time); at the contrary, I see as a non-sense theory (made by some serrist, but don't know who) that oceans are storing up heat, and that suddenly they will release such heat as a positive feedback: or the water warms than no heat can be considered ad «stored» (we have no phase change inside oceans, so no latent heat) or oceans begin to release heat but in the same time they have to cool (because they are losing heat); so, I don't feel strange that in last years land temperatures for some series (NCDC and GISS) can be heating up while oceans are slightly cooling, but I feel strange that they are heating up so much to reverse global trend from slightly negative / stable to slightly positive; but, in the end, all this is not an evidence that lands» warming is led by UHI (but, this effect, I would not exclude it from having a small part in temperature trends for some regional area, but just small); both because, as writtend, it is normal to have waters warming slower than lands, and because lands» temperatures are often measured in a not so precise way (despite they continue to give us a global uncertainity in TT values which is barely the instrumental's one)-- but, to point out, HadCRU and MSU of last years (I mean always 2002 - 2006) follow much better waters» temperatures trend; — metropolis and larger cities temperature trends actually show an increase in UHI effect, but I think the sites are few, and the covered area is very small worldwide, so the global effect is very poor (but it still can be sensible for regional effects); but I would not run out a small warming trend for airport measurements due mainly to three things: increasing jet planes traffic, enlarging airports (then more buildings and more asphalt — if you follow motor sports, or simply live in a town / city, you will know how easy they get very warmer than air during day, and how much it can slow night - time cooling) and overall having airports nearer to cities (if not becoming an area inside the city after some decade of hurban growth, e.g. Milan - Linate); — I found no point about UHI in towns and villages; you will tell me they are not large cities; but, in comparison with 20-40-60 years ago when they were «countryside», many small towns and villages have become part of larger hurban areas (at least in Europe and Asia) so examining just larger cities would not be enough in my opinion to get a full view of UHI effect (still remembering that it has a small global effect: we can say many matters are due to UHI instead of GW, maybe even that a small part of measured GW is due to UHI, and that GW measurements are not so precise to make us able to make good analisyses and predictions, but not that GW is due to UHI).

These surface networks have had so many changes over time that the number of stations that have been moved, had their time of observation changed, had equipment changes, maintenance issues, or have been encroached upon by micro site biases and / or UHI using the raw data for all stations on a national scale or even a global scale gives you a result that is no longer representative of the actual measurements, there is simply too much polluted data.

Measurement sites form the core input of the data set for calculating this «global mean temperature» (whatever that actually means), but the measurements from these sites is accurate at best to the nearest 1 degree, in actual practice around the nearest 5 degrees since many are reading off mercury thermometers — and this condition increases in frequency the further back in time you go.

Since then, a growing number of surface temperature measurement stations worldwide, coupled with improved methods for correcting for biases induced through urban heat island effects and other station siting and operational issues, have allowed for the development of accurate global temperature estimates.

I have seen sites like RealClimate arguing in their myth busting segments that the global temperature models are based only on rural measurements.

For this cherry - picked good example of a historical temperature measurement point, here are the adjustments that are made to this site's measurements before it is crunched up into the official historic global warming numbers: