2002
DOI: 10.1007/s00445-002-0224-3
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Field temperature measurements at Erta'Ale Lava Lake, Ethiopia

Abstract: The shield volcano Erta'Ale, situated in the Danakil Depression, Ethiopia, is known for its active lava lake. In February 2001, our team visited this lake, located inside an 80-m-deep pit, to perform field temperature measurements. The distribution and variation of temperature inside the lake were obtained on the basis of infrared radiation measurements performed from the rim of the pit and from the lake shores. The crust temperature was also determined from the lake shores with a thermocouple to calibrate the… Show more

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Cited by 54 publications
(40 citation statements)
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“…Wright & Pilger (2008) Occasional field observations since 1990 have helped to constrain the remote sensing observations. In the 1990s and early 2000s, the lake level appears to have been consistently around 70 -100 m below the pit rim (Global Volcanism Program 1992;Burgi et al 2002;Harris et al 2005). Between March 2003 and December 2004, the lake shrank until it was completely frozen over, with four hornitos marking points of degassing (Global Volcanism Program 2004a, b;Oppenheimer et al 2004), consistent with the MODIS observations of Wright & Pilger (2008).…”
Section: Review Of Prior Observations Of Erta 'Alesupporting
confidence: 56%
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“…Wright & Pilger (2008) Occasional field observations since 1990 have helped to constrain the remote sensing observations. In the 1990s and early 2000s, the lake level appears to have been consistently around 70 -100 m below the pit rim (Global Volcanism Program 1992;Burgi et al 2002;Harris et al 2005). Between March 2003 and December 2004, the lake shrank until it was completely frozen over, with four hornitos marking points of degassing (Global Volcanism Program 2004a, b;Oppenheimer et al 2004), consistent with the MODIS observations of Wright & Pilger (2008).…”
Section: Review Of Prior Observations Of Erta 'Alesupporting
confidence: 56%
“…Burgi et al 2002) or various types of infrared camera (Oppenheimer & Yirgu 2002;Spampinato et al 2008), typically show the same evolutionary pattern of the lava lake surface, with new crust being created at incandescent cracks and moving away from the cracks as semi-rigid plates to the lake edge where cold crust is subducted. The incandescent material is typically 700-11008C and the cooler crust is 300-6008C (Oppenheimer & Yirgu 2002;Oppenheimer et al 2004;Spampinato et al 2008), although Davies et al (2011) measured peak temperatures of around 11508C.…”
Section: Review Of Prior Observations Of Erta 'Alementioning
confidence: 99%
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“…The estimation of T e is dependent on the proportion of the lava lake surface occupied by the crust (f crust ), the exposed molten material (f lava ) mainly consisting of active lava fountains, and the cracks (f crack ), the latter of which are composed of a red, glowing central core surrounded by a cooler crust ( Figure 3a) [Burgi et al, 2002]. With the proportion values given in Appendix A, we obtain T e = 828 K. This value is smaller than field estimates of T e = 948 K based on lava lake activity in 1959 [Le Guern, 1987] …”
Section: Effective Radiation Temperature and Energy Fluxmentioning
confidence: 99%
“…, T e the effective radiation temperature (828 K), ε the emissivity, set to 0.95, a conservative value at these considered wavelengths [Harris et al, 2005;Staudacher, 2010] (but see Le Guern et al [1979] and Burgi et al [2002] for lower emissivity values), and A l the lava lake area (46,550 m 2 ). With these values, we get Φ r = 1.16 GW.…”
Section: à4mentioning
confidence: 99%