tag:blogger.com,1999:blog-7478606652950905956.post5984118837889174763..comments2024-03-28T23:07:35.632-07:00Comments on Cliff Mass Weather Blog: Inversions and Inverse BarometersCliff Mass Weather Bloghttp://www.blogger.com/profile/13948649423540350788noreply@blogger.comBlogger12125tag:blogger.com,1999:blog-7478606652950905956.post-32428935683471219982010-02-08T02:42:13.382-08:002010-02-08T02:42:13.382-08:00Weather
is a set of all the phenomena occurring i...<a href="http://weathertoday.v3host.be/" rel="nofollow">Weather</a><br /> is a set of all the phenomena occurring in a given atmosphere at a given time. Most weather phenomena occur in the troposphere, just below the stratosphere. Weather refers, generally, to day-to-day temperature and precipitation activity, whereas climate is the term for the average atmospheric conditions over longer periods of time. When used without qualification, "weather" is understood to be the weather of Earth.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-80324524751903231082010-01-31T16:17:55.723-08:002010-01-31T16:17:55.723-08:00In answer to JewelyaZ, yes you can see the inverse...In answer to JewelyaZ, yes you can see the inverse barometer effect for high as well as low pressure. There is a year-long study of this for Puget Sound at www.starpath.com/barobook<br /><br />the effect was known to 19th century mariners who had a saying "fog nipps the tide" implying that fog is often correlated with high pressure, which suppresses the tideDavidhttps://www.blogger.com/profile/16479478295589199669noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-32679060428151657612010-01-30T09:05:34.529-08:002010-01-30T09:05:34.529-08:00Is "inverse barometer effect" part of &q...Is "inverse barometer effect" part of "storm surge", except in this case we had the low pressure without exactly a storm?mbhttps://www.blogger.com/profile/04023290571238191194noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-48394649143330753612010-01-30T08:49:40.539-08:002010-01-30T08:49:40.539-08:00jprinehimer,
I wrote down 990 mb in error...sho...jprinehimer,<br /> I wrote down 990 mb in error...should have been 980 mb The pressure was down to roughly 980 mb. Average pressure is about 1017 mb. the is a 37 mb or roughly 37 cm anomaly....14.5 inches. As you note, there are secondary factor...ocean currents driven by sustained anomalous winds and the impact of sustained high waves from the low offshore...cliffCliff Mass Weather Bloghttps://www.blogger.com/profile/13948649423540350788noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-19608843219856628792010-01-29T10:01:25.243-08:002010-01-29T10:01:25.243-08:00i think that was my favorite of all of your appear...i think that was my favorite of all of your appearances (can one appear on the radio?) on kuow this morning cliff.<br /><br />your laughter was contagious regarding the weather in april.<br /><br />great fun, thanks.epjmcginleyhttps://www.blogger.com/profile/11567003877042810718noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-54730530815006938812010-01-28T23:00:26.531-08:002010-01-28T23:00:26.531-08:00I was fortunate enough to capture an image of the ...I was fortunate enough to capture an image of the moon halo on Monday as some thin cirrus moved in. You can check it out here:<br />http://reidwolcott.zenfolio.com/p704532299/h460595c#h460595cReidhttps://www.blogger.com/profile/08773884309896627333noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-33553509832205600742010-01-28T21:28:55.486-08:002010-01-28T21:28:55.486-08:00Where's the math, Cliff?
According to your num...Where's the math, Cliff?<br />According to your numbers above (15 mbars below normal) there would only be a 15 cm rise in sea level due to the "inverse barometer" effect. This is only 0.5 ft - just a quarter of the 2 ft difference between predicted tidal heights and observations. Also, look at 13 Jan - tidal heights are 1.5 ft above normal, but pressure is at 1005 mbar - only 8 mbars from "standard atmospheric pressure."<br /><br />Wind set-up is generally a much greater contributor to tidal anomalies. Wind set-up occurs when onshore winds "push" the water towards shore and cause the near-shore sea level to rise. (Actually, this is what happens in lakes and estuaries - in the ocean, the Coriolis force becomes important, causing Ekman transport towards shore, and set-up when winds are from the south for the West coast of the US). This also works in reverse, causing set-down, when winds are from the opposite direction.<br /><br />Similar effects occur during storm surges. The pressure surge is usually a good deal smaller than the wind and wave driven storm surge.jprinehimerhttps://www.blogger.com/profile/05531960440077728120noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-36753813832894034722010-01-28T20:30:46.390-08:002010-01-28T20:30:46.390-08:00This comment has been removed by the author.Cliff Mass Weather Bloghttps://www.blogger.com/profile/13948649423540350788noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-39379062213197679002010-01-28T13:26:44.360-08:002010-01-28T13:26:44.360-08:00Jayne,
Go here to learn about moondogs, moonbows, ...Jayne,<br />Go here to learn about moondogs, moonbows, and other such sights: <a href="http://www.spaceweather.com" rel="nofollow">Spaceweather.com</a><br /><br />It's also an excellent site... not as personable as Cliff is here, but lots of juicy information!<br /><br />For instance, the next full moon is BIGGER than a normal full moon... it's a perigee full moon, 14% larger than normal. And there have been polar stratospheric clouds observed at sunset a few times recently... photos <a href="http://www.atoptics.co.uk/fz372.htm" rel="nofollow">here</a>.JewelyaZhttps://www.blogger.com/profile/09434569437851248356noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-75566655845030614752010-01-28T08:45:53.394-08:002010-01-28T08:45:53.394-08:00On another note, last night there was a wide ring ...On another note, last night there was a wide ring or "halo" around the moon, was that just refracted light from the moon? It was cool to see.Sister Sagehttps://www.blogger.com/profile/18202392932551111583noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-19596824869199385172010-01-28T08:04:35.982-08:002010-01-28T08:04:35.982-08:00We marked a predicted 13.2 tide on Jan 5. After yo...We marked a predicted 13.2 tide on Jan 5. After your pressure/tide post last week, we marked a predicted 12.2 tide about 6" higher than that 13.2 mark. Very cool to observe this.Scotthttps://www.blogger.com/profile/12247167607871572922noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-26419423617570956262010-01-27T22:20:37.342-08:002010-01-27T22:20:37.342-08:00The tide thing with the low pressure is amazing......The tide thing with the low pressure is amazing... is the opposite also true? If the pressure is really high are the tides lower than predicted? <br /><br />Presumably, most people wouldn't notice or care because lower tides don't equal flooding... but they could mean poor tide-pool formation, and maybe more interestingly, exposure of old shipwrecks?<br /><br />Just curious... and loving the "boring" weather. It's amazing to get to see some of the winter stars and planets... we've actually seen some meteorites in the past week as well. Can't think of too many winters when that's been the case, so it's an interesting change.<br /><br />My boss has been in Manila for the past ten days. He thinks my co-worker and I are lying when we say it's been sunny for at least part of every day that he's been gone. LOLJewelyaZhttps://www.blogger.com/profile/09434569437851248356noreply@blogger.com