tag:blogger.com,1999:blog-2313427464944392482.post1053080758825126416..comments2024-03-25T05:30:23.847+11:00Comments on HotWhopper: Cyclone Pam hits VanuatuSouhttp://www.blogger.com/profile/08818999735123752034noreply@blogger.comBlogger17125tag:blogger.com,1999:blog-2313427464944392482.post-20127767170927126632015-03-18T22:48:28.523+11:002015-03-18T22:48:28.523+11:00Bernard
Perhaps of interest to you:
http://www.r...Bernard<br /><br />Perhaps of interest to you:<br /><br />http://www.realclimate.org/index.php?p=18212Jammy Dodgerhttps://www.blogger.com/profile/08360437479098314946noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-75752956672259656182015-03-16T15:32:53.267+11:002015-03-16T15:32:53.267+11:00In today's Sydney Morning Herald is this Op-e...In today's Sydney Morning Herald is <a href="http://www.smh.com.au/comment/climate-change-brings-disasters-on-steroids-20150316-1m03dr.html/" rel="nofollow">this Op-ed</a> and this <a href="http://www.smh.com.au/environment/un-climate-conference/extreme-weather-the-new-normal-in-australias-disasterprone-neighbourhood-20150315-144mio.html" rel="nofollow">article</a>PGhttps://www.blogger.com/profile/10807913317731807617noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-78514982818767249062015-03-16T13:43:01.637+11:002015-03-16T13:43:01.637+11:00Frank, I did subsequently come across the HSI. It&...Frank, I did subsequently come across the HSI. It's closer to what I am thinking about, although not quite there - as you say though, one takes what one can get.<br /><br />The HSI approach doesn't seem to have been applied much beyond the Atlantic context, which would seem to further limit its utility. I'll continue to hope for an integral approach that can be applied to all storms across the planet, in a way that provides a direct indication of energy expenditure - perhaps one day that wish will be granted!Bernard J.https://www.blogger.com/profile/16299073166371273808noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-695267223113728042015-03-16T13:42:12.493+11:002015-03-16T13:42:12.493+11:00This comment has been removed by the author.Bernard J.https://www.blogger.com/profile/16299073166371273808noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-5454398811991697002015-03-15T23:56:16.888+11:002015-03-15T23:56:16.888+11:00Bernard
OK, I see what you mean now. Thanks.Bernard<br /><br />OK, I see what you mean now. Thanks.Jammy Dodgerhttps://www.blogger.com/profile/08360437479098314946noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-35048264016251380772015-03-15T19:50:25.268+11:002015-03-15T19:50:25.268+11:00On a scientific (and hence irrelevant in the here ...On a scientific (and hence irrelevant in the here and now) tangent ... Between them these storms are packing an almighty westerly wind burst in the equatorial Pacific. Presumably this could kick ENSO into high gear by providing the necessary atmospheric coupling to the huge sub-surface signature already in place in the ocean.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-83609733350614164372015-03-15T15:56:41.114+11:002015-03-15T15:56:41.114+11:00Bernard, ACE is only one of several indices used t...Bernard, ACE is only one of several indices used to measure total storm energy. There is the Power Dissipation Index (which reduces the bias in ACE towards moderate but long lived storms), the Hurricane Severity Index (which accounts for the size of the wind field as well as its strength). There is even the special Index (wrongly called ACE) that props up claims of no change in tropical storm frequency - it is ACE, but with an arbitrary floor value, allowing the author to cherry pick the data to bolster his case.<br /><br />I agree that some of these metrics are crude, but you work with what you have - expecting finer temporal or spatial resolution, which would be needed for a substantial improvement, is optimistic at best.Frank Dnoreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-35083353351047504532015-03-15T14:50:13.385+11:002015-03-15T14:50:13.385+11:00To add to my previous reply, whilst 'accumulat...To add to my previous reply, whilst 'accumulated cyclone energy' may be proportional to the actual integrated expended energy there is no reason why it should always be so, or that any proportionality is simple.<br /><br />It's a bit like height and weight both being 'proportional' to nutrition, and using height as a measure of obesity. Height alone is not the <i>best</i> measure...Bernard J.noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-30771692805733440672015-03-15T14:43:19.255+11:002015-03-15T14:43:19.255+11:00The index is calculated by taking the (mean?) sust...The index is calculated by taking the (mean?) sustained wind speed at 6-hour intervals and applying a squaring formula. There is no accounting for the <i>size</i> of the storm, in terms of actual mass of air involved, or of total water/humidity content which may affect the overall energy dynamics. In addition, 6 hour intervals would produce a relatively coarse resolution of the energy trajectory of the storm.<br /><br />Further, the occurence of the intervals is local time dependendent, and not fixed with reference to an estimation of a formation point of the storm. However the likely error that would result is probably small compared to the other issues.<br /><br />These are the main reason why overall I am curious about an integral of storm energy - something that captures all energy expenditure over space and time.<br /><br />That's where the <i>real</i> story would (or would not...) be.Bernard J.noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-46146040467105636142015-03-15T07:28:29.029+11:002015-03-15T07:28:29.029+11:00Bernard J
Can you explain? Thanks.Bernard J<br /><br />Can you explain? Thanks.Jammy Dodgerhttps://www.blogger.com/profile/08360437479098314946noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-29148451390177947272015-03-14T22:27:30.239+11:002015-03-14T22:27:30.239+11:00(Before anyone suggests it, 'accumulated cyclo...(Before anyone suggests it, 'accumulated cyclone energy' is not the same thing...)Bernard J.noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-20149865652841189442015-03-14T22:05:55.204+11:002015-03-14T22:05:55.204+11:00I said it 11 months ago and I'll say it again,...I said it <a href="http://blog.hotwhopper.com/2014/04/more-on-tropical-cyclone-ita.html?showComment=1397218074038#c7988675701506508872" rel="nofollow">11 months ago</a> and I'll say it again, it would be very interesting to see an analysis of storm by integral of expended energy rather than by peak wind speed.<br /><br />I think that there is a big story there.Bernard J.noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-34507920770989824942015-03-14T19:01:29.625+11:002015-03-14T19:01:29.625+11:00Measurements vary (the Japanese have her relativel...Measurements vary (the Japanese have her relatively weaker), but if the local observations are correct, Pam reached 250 km/h for 10-minute sustained winds, making her 45 km/h stronger than Marcia at her peak. Put it another way, although her 1-minute sustained winds were considerably lower, this 10-minute sustained measurement suggests Pam was stronger than Typhoon Haiyan...Hell's teeth!FrankDnoreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-44294851174350954102015-03-14T14:42:54.724+11:002015-03-14T14:42:54.724+11:00"Weakened" to a cat 4, yikes."Weakened" to a cat 4, yikes.numerobisnoreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-78367064470404559802015-03-14T11:22:01.756+11:002015-03-14T11:22:01.756+11:00I should have refreshed the webpage. Cyclone Pam h...I should have refreshed the webpage. Cyclone Pam has weakened to a Cat 4 and has resumed it's south-easterly track towards New Zealand. Anonymoushttps://www.blogger.com/profile/11552461190113661645noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-75293654579058254232015-03-14T11:12:42.999+11:002015-03-14T11:12:42.999+11:00If it keep drifting westward New Caledonia may be ...If it keep drifting westward New Caledonia may be adversely affected.Anonymoushttps://www.blogger.com/profile/11552461190113661645noreply@blogger.comtag:blogger.com,1999:blog-2313427464944392482.post-43442592787566500022015-03-14T05:33:25.285+11:002015-03-14T05:33:25.285+11:00:- (:- (citizenschallengehttps://www.blogger.com/profile/04559990934735912814noreply@blogger.com