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自然铁试验 - KEOPS 2 cruise (Oct-Nov,2011)

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做梦的播客 发表于 2012-1-13 05:04:53 | 显示全部楼层 |阅读模式
本帖最后由 做梦的播客 于 2012-1-13 05:11 编辑

I was not certain if I should go when I was invited to sail with French scientists for the KEOPS 2 (KErguelen :compared study of the Ocean and the Plateau in Surface water) cruise 2 years ago to study natural iron fertilization processes.  As it got close, especially I offered them 50 surface velocity drifters for free and use of the LISST (Laser In-Situ Scattering Transmissometry) for particles between 1 and 250 microns and LOPC (Laser Optical Plankton Counter) for particles between 100 micron and 3 cm, they insisted, and finally I agreed.

Natural iron fertilization in the Southern Ocean, which have been of my focuses in last several years, occurs at the submesoscale embedded in mesoscale eddies.   25-50% of carbon export occurs in the Southern Ocean which makes my study meaningful in the current global warming.  Is this keeping me in oceanography as we will never be rich nor favors?  To understand fertilization processes requires resolving a mesoscale physical feature, trace metal fields, plankton community structures from microbes to mesozooplankton, and process rates of mixing, upwelling, primary and community production, grazing and export flux, and then synthesize all of them together – a daunting task.  

The cruise departed from la Reunion Island on Oct 8, and arrived at la Reunion Island on Nov 30.  I complained how long this cruise was.  Here are some photos on those sensors:

Composited view of RV Marion Dufresne

Sunset in a calm day

Kerguelen Island in a windy day

Being a super marine tech

LISST, LOPC and battery pack mounted on the CTD-rosette extension

Deploying the CTD-rosette including 2 lowered ADCPs, Video Plankton Record, LISST, LOPC, Transmissometry, PAR, fluorometer, CDOM fluorometer and oxygen sensors, a package more than $2 million.

Deploying SVP drifters

Drifter – attraction to birds

Preparing the trace metal clean rosette

Preparing the turbomap for measuring micro-structure shear and temperature by Korean 颂词entists

Deploying radium pumps


Deploying drifting traps

Deploying a Bongo net

Kerguelen Island in distance

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miles 发表于 2012-1-13 21:35:28 | 显示全部楼层
感觉很ok
jlinwhoi 发表于 2012-1-14 10:13:03 | 显示全部楼层
本帖最后由 jlinwhoi 于 2012-1-16 16:55 编辑

多谢周老师的精彩分享!为什么需要放50个“surface velocity drifters”?
lfan 发表于 2012-1-14 18:17:43 | 显示全部楼层
很有趣的实验,美丽的南大洋
 楼主| 做梦的播客 发表于 2012-3-1 05:32:20 | 显示全部楼层
本帖最后由 做梦的播客 于 2012-3-1 05:34 编辑

回复 3# jlinwhoi
一直忙忙碌碌,很久没来了。
为什么要放那么多Drifters? 附上两幅图,这是从我们去年十月到今年2月23日,那48个Drifter的轨迹图。很多Drifter都投放在很小的区域里,但它们很快就分散开,走上不同的路了。
(图太大了。你们要Click它一下,全图就出来了。)

在我们的工作区域,风成流和中尺度涡使得流场有很大的随机性。所以需要很多Drifters才能得到统计结果。

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jlinwhoi 发表于 2012-3-1 08:12:46 | 显示全部楼层
回复 5# 做梦的播客

酷。大多数Drifters在凯尔盖朗群岛(Kerguelen Islands)以东下水,漩涡状地往东飘向东南印度洋中脊(Southeast Indian Ridge)。多长时间给Drifter卫星定位一次?
 楼主| 做梦的播客 发表于 2012-3-1 09:40:38 | 显示全部楼层
回复 6# jlinwhoi
一天定位10-16次。数据里有很多潮流和风流的信号,我加了一个48小时的滤波器。
Vrinck 发表于 2018-4-23 21:56:23 | 显示全部楼层
做梦的播客 发表于 2012-3-1 09:40
回复 6# jlinwhoi
一天定位10-16次。数据里有很多潮流和风流的信号,我加了一个48小时的滤波器。

太酷了!我没想到自己已经晚了7年
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