[cogitator]

Is that a lava tube behind the weather station and running down to the ocean from left to right?

I don't know how you knew, but you did. Good job!

As an aside, it's very hard to find pictures of Earth- surface collapsed lava tubes, though they are numerous on shield volcanoes. I happened to know that this island had some, and thanks to the wonders of Google, I found this picture of one.

It's very easy to find either pictures inside an old lava tube (such as the famous Thurston lava tube in Hawaii Volcanoes National Park) or pictures of active lava tubes, such as the ones continually forming during the current eruption of Kilauea in the same park. But ancient collapsed tubes at the surface just look like big ruts or trenches, and aren't very photogenic. It looks to me like the one on Ile Amsterdam had a few hornitos (small lava vents) along the way to the sea.

[Lokibob]

Martin De Vivies Ile Amsterdam (#61996) -- French Southern Territories

Date

Data source (weather station)  

Date selector

5 April 2004

 Martin De Vivies Ile Amsterdam - #61996 (37°48'S 77°32'E)  

 Altitude above sea level:  29 m  

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5.04.2004 - Daily summary					5.04.2004 - Hourly observations (surface)
Temperature		Precipitaion			Time	T (water)	Snow depth	T (ground)	Ground cond.
Mean	+18.1°C	24 hrs (day + night subseq.)	0		05:00 / 00:00	...	...	...	...
Maximum	+19.1°C	Day	2.0 mm		11:00 / 06:00	...	...	...	...
Minimum	+17.2°C	Preceding night	0.2 mm		17:00 / 12:00	...	...	...	...
Min. ground T	...	Sunshine duration	0 hours		23:00 / 18:00	...	...	...	...

5.04.2004 - Hourly observations (atmosphere)
Time local / GMT	Air temp.	Pressure @sea level mm (hPa)	Pressure @29 m mm (hPa)	Rel. humid.	Dew point	Wind, m/s direction - speed (gust)		Visibi- lity	Cloudi- ness	Cloud base altitude (form)		Conditions (KN-01 code)
05:00 / 00:00	+18°C	770 (1027)	768 (1024)	79%	+14°C	NW (320°) -	9 (...)	7.5 km	50%	1750 m	(Sc)
11:00 / 06:00	+17°C	769 (1025)	766 (1021)	95%	+16°C	NW (320°) -	10 (...)	5.6 km	100%	450 m	(St)	(50) Intermittent light drizzling
17:00 / 12:00	+18°C	766 (1021)	763 (1018)	92%	+17°C	NW (310°) -	8 (...)	7.0 km	40%	800 m	(Cu)
23:00 / 18:00	+17°C	765 (1020)	762 (1016)	88%	+15°C	W (290°) -	9 (...)	...	60%	...	(...)
Mean	+17°C	768 (1023)	765 (1020)	89%	...	9 m/s		...	60%	...

Local time displayed is Local Standard Time at station location (without correction for daylight saving).
GMT to Local Standard time conversion used for station Martin De Vivies Ile Amsterdam (#61996): Local Standard time = GMT+5:00.

 

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Here is my story about being an Arctic explorer:

 

http://lokibob.bravepages.com/greenland.html