tag:blogger.com,1999:blog-1367053740188758246.post7262883493462419902..comments2023-06-21T00:39:34.443-07:00Comments on Dosbat: April 2015 Status. Part 2.Chris Reynoldshttp://www.blogger.com/profile/16843133350978717556noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-1367053740188758246.post-44031567315822326422015-07-11T09:36:26.844-07:002015-07-11T09:36:26.844-07:00I'm just about to post about Chukchi, Beaufort...I'm just about to post about Chukchi, Beaufort compactness dropped early in the season, but has declined at roughly average levels since. So yes, it looks like Beaufort will be protected to some degree by winter's export of MYI.Chris Reynoldshttps://www.blogger.com/profile/16843133350978717556noreply@blogger.comtag:blogger.com,1999:blog-1367053740188758246.post-8751235875150717892015-07-11T07:19:40.425-07:002015-07-11T07:19:40.425-07:00You were right: the "protective arm" in ...You were right: the "protective arm" in the Beaufort will continue to wither away over the next few weeks. There appears be a rear-guard arm near the 80th parallel that could afford some protection to the central basin. We'll see how it holds up under the next week of warmth and melt ponding.icemannoreply@blogger.comtag:blogger.com,1999:blog-1367053740188758246.post-5276087121397622292015-05-11T11:24:43.106-07:002015-05-11T11:24:43.106-07:00Iceman,
But as explained at the end of the above ...Iceman,<br /><br />But as explained at the end of the above post, having thought that MYI would play a big role I am now no longer convinced there is enough volume of thick ice to have much of an impact. It looks to me like we are not in for anything near a 2010 style survival of ice due to this process.Chris Reynoldshttps://www.blogger.com/profile/16843133350978717556noreply@blogger.comtag:blogger.com,1999:blog-1367053740188758246.post-47614274623087888252015-05-10T16:31:50.069-07:002015-05-10T16:31:50.069-07:00Your observation of "two radically different ...Your observation of "two radically different ice packs" sounds like a good narrative theme for this melt season. The Beaufort region of what you have marked as "Peripheral Seas" has a considerable amount of thicker and/or MYI, owing to the combination of gyre circulation and anomalous winter winds that pushed the ice deeper south than usual (compared with recent years). Nearby that thick ice is early open water, which looks set to be joined soon by melting off Barrow. It appears that the southern Beaufort will pick up some heat in the coming week - from both insolation and southerly winds - and then the thicker ice will get pushed into the warmer or more fragmented zone. This should give an early indication of whether the "protective arm" of thick ice will remain effective later in the season.icemannoreply@blogger.comtag:blogger.com,1999:blog-1367053740188758246.post-40043147998422449672015-05-07T10:01:48.977-07:002015-05-07T10:01:48.977-07:00David,
Sorry, not reading what you said closely e...David,<br /><br />Sorry, not reading what you said closely enough.<br /><br />"40 columns and 6 rows would be about the right amount of data."<br /><br />Try this:<br /><br />DateIndex,0 to 0.9m,1m to 1.9m,2m to 2.9m,3m to 3.9m,4m and above<br />4/1978,568.0,2837.9,7113.3,13482.2,5267.2<br />4/1979,644.0,2389.6,7601.9,12598.5,6083.4<br />4/1980,394.6,2328.5,8283.3,10703.4,6609.9<br />4/1981,571.4,2855.5,11451.9,8733.8,3545.7<br />4/1982,589.5,3191.9,13538.7,6927.6,735.7<br />4/1983,553.4,2975.2,10262.3,6972.6,5324.7<br />4/1984,355.5,3392.9,8860.6,9234.3,4198.6<br />4/1985,614.0,2362.6,9622.2,10159.1,3943.2<br />4/1986,488.4,3079.4,8689.4,9947.2,5102.3<br />4/1987,480.8,2776.0,9419.4,10487.0,4759.1<br />4/1988,610.2,2301.8,11733.5,9445.4,3417.1<br />4/1989,462.1,3095.6,11959.0,4856.4,6293.7<br />4/1990,567.8,3177.9,10288.9,5332.1,6659.9<br />4/1991,438.4,2242.1,10439.3,8145.7,5616.5<br />4/1992,500.6,2817.1,10571.8,7030.0,4875.2<br />4/1993,334.5,2868.7,11737.1,6097.6,5457.5<br />4/1994,425.8,2515.1,12261.9,5894.3,4516.1<br />4/1995,532.1,2688.4,11644.2,6449.5,3347.8<br />4/1996,473.1,2824.9,12897.2,5826.4,2100.8<br />4/1997,542.0,3438.1,11513.1,5644.0,4367.2<br />4/1998,606.8,3155.9,12508.5,7419.0,1727.5<br />4/1999,703.9,2726.6,14010.3,6444.0,645.2<br />4/2000,550.9,4304.3,11173.3,5388.0,2134.9<br />4/2001,581.4,4243.1,11427.8,6388.8,1368.5<br />4/2002,509.6,3410.7,13115.4,3168.3,3497.5<br />4/2003,435.7,4618.1,12208.4,3523.9,2901.7<br />4/2004,511.6,3651.9,12003.9,4997.6,1368.9<br />4/2005,604.8,3488.5,12798.0,4268.5,1499.3<br />4/2006,582.3,3355.1,13229.3,4461.3,54.5<br />4/2007,741.2,5240.3,9907.5,2827.6,1574.0<br />4/2008,583.6,5404.4,10728.4,2330.3,2095.6<br />4/2009,560.7,4842.9,11688.1,3444.8,706.5<br />4/2010,765.0,4257.2,12830.1,2812.2,139.5<br />4/2011,647.5,7551.1,8618.5,1978.8,528.8<br />4/2012,985.4,4529.1,11042.1,2800.6,31.2<br />4/2013,733.7,6971.7,9811.0,1974.3,66.3<br />4/2014,731.0,8034.4,6753.2,2474.7,1303.9<br />4/2015,580.3,6076.7,8972.7,2029.3,2992.6<br />Chris Reynoldshttps://www.blogger.com/profile/16843133350978717556noreply@blogger.comtag:blogger.com,1999:blog-1367053740188758246.post-6264372159377923672015-05-07T09:57:26.667-07:002015-05-07T09:57:26.667-07:00Pete,
Those last two tables are calculated using ...Pete,<br /><br />Those last two tables are calculated using gice, as I outline at the start of the post I only have equivalent data back to 2000.<br /><br />I could do the same using monthly gice for April 1979 to 2014. That would lack 2015, but would give a long term perspective. Otherwise to include April 2015 I can only go back to 2000.<br /><br />Let me know and I can do it. Also do you want numbers or graphs?<br /><br />David,<br /><br />I haven't got round to updating my online data yet, I intend to tomorrow. But if you look at the top right side panel of the page "Sea Ice Data", the top link is to my regional PIOMAS data.<br /><br />http://dosbat.blogspot.co.uk/2013/12/regional-piomas-volume-data.html<br /><br />The volume by thickness breakdown is available as a csv file. See under the heading 'The Data', item 4. These are from a Google Drive account I use, let me know if you can download and make use of that data.<br /><br />I warn you, it is big. But for the Arctic Ocean (regions 3 to 11) there is data as region 17 at the end of the file.<br /><br />If that data is going to be too detailed for you to use I can easily extract just April and post in a separate file.<br /><br />So:<br />1) Have a go at downloading that data so I know you can get it.<br />2) If you need me to extract April it will be very easy for me to do and I can post as a separate file for you tomorrow if needed.<br /><br />Let me know how you get on with 1 and whether you need 2.Chris Reynoldshttps://www.blogger.com/profile/16843133350978717556noreply@blogger.comtag:blogger.com,1999:blog-1367053740188758246.post-64355734350086457512015-05-07T06:31:04.438-07:002015-05-07T06:31:04.438-07:00Chris,
Great analysis as always, I look forward t...Chris, <br />Great analysis as always, I look forward to reading it in depth over the weekend.<br /><br />Is there any chance you could send me the consolidated data used to create the PIOMAS Volume distribution with grid box effective thickness All Piomas Domain.<br /><br />I am just looking for the high level stuff you used to create the graph so I guess an excel table with 40 columns and 6 rows would be about the right amount of data. I can guess with a ruler and magnifying glass but the actual figures would be good. <br />Thanks.Anonymoushttps://www.blogger.com/profile/00009729359611511868noreply@blogger.comtag:blogger.com,1999:blog-1367053740188758246.post-58040852285945997762015-05-06T20:06:09.337-07:002015-05-06T20:06:09.337-07:00Thanks,
I hate to ask you for more but in the last...Thanks,<br />I hate to ask you for more but in the last two tables what would the pre-2007 years look like. For example what would the numbers be for a few1980s or 1990s look like? <br />PeteAnonymousnoreply@blogger.com