多少的总运输南极绕极流改变随着时间的推移?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 07 - t07:17:48z //www.hoelymoley.com/feeds/question/4271 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/4271 9 多少的总运输南极绕极流改变随着时间的推移? arkaia //www.hoelymoley.com/users/111 2015 - 01 - 15 - t18:13:21z 2015 - 02 - 24 t09:19:04z < p >南极绕极流(ACC),南极大陆周围的海洋电流流动,有许多链接,天气和气候过程(例如,< a href = " //www.hoelymoley.com/questions/3201/is-there-conclusive-evidence-for-the-antarctic-circumpolar-current-developing-af " >有确凿证据的南极绕极流南极洲的冰川作用后发展? < / >)。我的问题是如何改变当前的总运输时间在不同的时间尺度?很明显,它已经改变了自其潜在的中新世末的形成。我的兴趣是在短时间尺度(季节性),十年(例如,ENSO影响)和较长的时间尺度。< / p > //www.hoelymoley.com/questions/4271/-/4444 # 4444 2 答案为多少plannapus南极绕极流的总运输改变随着时间的推移? plannapus //www.hoelymoley.com/users/87 2015 - 02 - 24 t08:38:59z 2015 - 02 - 24 t09:19:04z < p >从阅读有关这一课题的文献,我的印象是,我们不知道在这个问题上,主要是由于缺乏测量。My understanding is that the first and only year-long time-series was made at the Drake Passage in 1979 (e. g. Whitworth & Peterson, 1985) by the ISOS programme (International Southern Ocean Studies). In addition to that NOAA's WOCE (World Ocean Circulation Experiment) added yearly data from 1990 to 2002.

According to Rintoul & Sokolov 2001 and Rintoul et al. 2001, most of the variability south of Tasmania is due to changes in currents north of the ACC itself. Cunningham et al. 2003 show that the moderate interannual variation in baroclinic transport they observed seem to be coeval with variations in the location of the Polar Front (it moves north or south on a 90km range). But overall the variability seems to be relatively low, and the ACC relatively steady.

White & Peterson, 1996 showed an interesting phenomenon that they called the Antarctic Circumpolar Wave: it is a "wave" in the ACC circling the globe in ca. 8 yrs with a period of 4yrs at any location and it is defined by anomalies in sea-suface temperature, sea-level pressure and sea-ice extent. However no evidence for corresponding anomalies in volume transport was showed, to my knowledge.

So, to summarize, as far as I can see:

  • not enough data for seasonal trends (only one yearlong time-series);
  • some interannual variability (possibly as a consequence of variabilities in other water masses);
  • not enough data to study decadal variation.
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