tag:blogger.com,1999:blog-7729093380675162051.post8277228635415607111..comments2024-03-28T13:56:47.604+11:00Comments on moyhu: To see the month's GHCN coverage, patience is needed. Nick Stokeshttp://www.blogger.com/profile/06377413236983002873noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-7729093380675162051.post-12467644190933570352018-06-02T10:51:47.711+10:002018-06-02T10:51:47.711+10:00Nick, thanks for the links. I will check them out...Nick, thanks for the links. I will check them out. I've been wondering how BEST was bringing in so much short period data and getting anomalies.Bryan - oz4casterhttps://www.blogger.com/profile/18027990322659101002noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-35568276413578832282018-06-02T10:47:55.567+10:002018-06-02T10:47:55.567+10:00Bryan,
There isn't a reference period. I'v...Bryan,<br />There isn't a reference period. I've explained the method <a href="https://moyhu.blogspot.com/2015/05/how-to-average-temperature-over-space.html" rel="nofollow">here</a>. It's the same method now used by BEST.<br /><br />You can look up individual Bolivia records using the <a href="https://moyhu.blogspot.com/p/blog-page_12.html" rel="nofollow">portal</a>. Click the GHCN Stations radio button and search Ctrl F for Bolivia. There is a lot of data, with a lot of gaps. Least Squares is good for that.<br />Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-35669381912425427672018-06-02T08:05:16.099+10:002018-06-02T08:05:16.099+10:00Well after posting above, I now see that you have ...Well after posting above, I now see that you have managed to calculate anomalies for the GHCN stations in Bolivia for April 2018 as seen on your WebGL map of temperatures. I saw that I could click on the station to see the name, anomaly, and temperature average in small box on the right. I missed seeing an anomaly reference period. Nicely done, but how are you able to generate an anomaly?<br /><br />I presume there must be more data than what I see in Ogimet?Bryan - oz4casterhttps://www.blogger.com/profile/18027990322659101002noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-25849220833167908062018-06-02T07:54:19.863+10:002018-06-02T07:54:19.863+10:00Thanks Nick. I've never looked at the CLIMAT ...Thanks Nick. I've never looked at the CLIMAT reports on Ogimet before. I noticed from your link for Bolivia that most of the stations reporting for April 2018 have relatively high atmospheric pressures and warm temperatures and only a few have much colder temperatures and low pressures indicating high altitudes. I also noticed that when I change the year to "2017" or "2016" in the URL, there is no data reported, unlike what I see for the synoptic data maps at Ogimet where I can jump back to previous years for comparison by editing the URL. So, perhaps CLIMAT data from these sites is very new and thus difficult to convert to anomalies for use in global or regional integration?<br /><br />It would be interesting to compare anomalies from such a wide range of altitudes in fairly close proximity.Bryan - oz4casterhttps://www.blogger.com/profile/18027990322659101002noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-19022062116419291632018-06-02T06:35:38.213+10:002018-06-02T06:35:38.213+10:00Bryan,
GHCN only records actual measurements. You ...Bryan,<br />GHCN only records actual measurements. You can see the raw data submitted each month via CLIMAT at <a href="http://www.ogimet.com/cgi-bin/gclimat?lang=en&mode=1&state=Boli&ind=&ord=REV&verb=no&year=2018&mes=04&months=" rel="nofollow">Ogimet</a>. I've set the link to bolivia.<br />Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-69877395592294437822018-06-02T05:18:03.991+10:002018-06-02T05:18:03.991+10:00Nick, thanks for the link about Bolivia. Do you h...Nick, thanks for the link about Bolivia. Do you happen to know if we now have actual measurement data for GHCN stations in Bolivia now? Or is it still inferred from surrounding areas as mentioned in the link beginning 1990?Bryan - oz4casterhttps://www.blogger.com/profile/18027990322659101002noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-35644533890025340712018-05-31T11:32:55.756+10:002018-05-31T11:32:55.756+10:00Steven,
As soon as ERSST comes in, I post the curr...Steven,<br />As soon as ERSST comes in, I post the current estimate <a href="https://moyhu.blogspot.com/p/latest-ice-and-temperature-data.html#mesh" rel="nofollow">here</a>, along with a map and station count. I don't keep a record (I should), but I do post on about the 8th, so that can later be compared with the more complete count <a href="https://moyhu.blogspot.com/p/latest-ice-and-temperature-data.html#L1" rel="nofollow">here</a>. For March, I <a href="https://moyhu.blogspot.com/2018/04/march-global-surface-templs-up-0021.html" rel="nofollow">posted</a> 0.704°C; it now stands at 0.721°C (mostly seems to go up, probably because sea-based gets replaced by land).<br />Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-31322111908546591612018-05-31T11:21:41.987+10:002018-05-31T11:21:41.987+10:00Bryan,
Interesting to mention Bolivia; how things ...Bryan,<br />Interesting to mention <a href="https://chiefio.wordpress.com/2010/01/08/ghcn-gistemp-interactions-the-bolivia-effect/" rel="nofollow">Bolivia</a>; how things change! <br /><br />Yes, it's true that the sequence is different for different months - March was fairly free of major stragglers.<br />Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-41382159192066033252018-05-31T10:23:16.605+10:002018-05-31T10:23:16.605+10:00It would be cool to show how the average changes a...It would be cool to show how the average changes as reports come in.<br />I know we do our reports early, and can recall only one time when late data made a noticable differencesteven mosherhttps://www.blogger.com/profile/14429995338772400014noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-18504202584572557972018-05-31T07:19:25.790+10:002018-05-31T07:19:25.790+10:00I forgot to mention that you can see the synoptic ...I forgot to mention that you can see the synoptic temperature data coverage here:<br />http://www.ogimet.com/gsynop_nav.phtml.en<br /><br />Click on the map to select an area and then select "temperature" in the table of variables under the map.<br /><br />I notice that Russia also has a huge number of synoptic weather stations reporting temperature compared to the GHCN stations on your map. I'm guessing that BEST may be picking up the additional synoptic station data, but have not checked into it.Bryan - oz4casterhttps://www.blogger.com/profile/18027990322659101002noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-54995088876944702692018-05-31T07:07:10.611+10:002018-05-31T07:07:10.611+10:00Interesting and nicely depicted, but not too surpr...Interesting and nicely depicted, but not too surprising considering the problems with late data you have mentioned in the past. I can imagine that each month may be a bit different in the timing and sequence of data arrival. Reassuring to know that the TempLS global integration index does not change much with the late stragglers, although I would expect it to be very unusual for a few late stragglers to have much impact on the integration of the mass of data already in. The only exceptions might be if there were stragglers from isolated areas (thus higher weighting) that happened to have very large anomalies, but I'm guessing this would be quite rare and still a small effect.<br /><br />Also interesting to compare the station coverages by nation. Some very poor nations, like Bolivia, have much higher station density than wealthy nations like Australia and Canada. I'm surprised that the Greenland Summit station does not seem to be included. It reports to the global synoptic weather network as station 04416. Also, Canada has a large number of synoptic weather stations that are not showing up. Odd that they are not included when the data should be readily available from the synoptic network.Bryan - oz4casterhttps://www.blogger.com/profile/18027990322659101002noreply@blogger.com