Pāhoehoe flow cooling, discharge, and coverage rates from thermal image chronometry

Andrew J L Harris, Jonathan Dehn, Mike R. James, Christopher W Hamilton, Richard Herd, Luigi Lodato, Andrea Steffke

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Theoretically- and empirically-derived cooling rates for active pāhoehoe lava flows show that surface cooling is controlled by conductive heat loss through a crust that is thickening with the square root of time. The model is based on a linear relationship that links log(time) with surface cooling. This predictable cooling behavior can be used assess the age of recently emplaced sheet flows from their surface temperatures. Using a single thermal image, or image mosaic, this allows quantification of the variation in areal coverage rates and lava discharge rates over 48 hour periods prior to image capture. For pāhoehoe sheet flow at Kīlauea (Hawai'i) this gives coverage rates of 1-5 m2/min at discharge rates of 0.01-0.05 m3/s, increasing to ∼40 m2/min at 0.4-0.5 m3/s. Our thermal chronometry approach represents a quick and easy method of tracking flow advance over a three-day period using a single, thermal snap-shot.

Original languageEnglish (US)
Article numberL19303
JournalGeophysical Research Letters
Volume34
Issue number19
DOIs
StatePublished - Oct 16 2007
Externally publishedYes

Fingerprint

cooling
surface cooling
sheet flow
lava
lava flow
surface temperature
shot
crusts
rate
crust
heat

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Pāhoehoe flow cooling, discharge, and coverage rates from thermal image chronometry. / Harris, Andrew J L; Dehn, Jonathan; James, Mike R.; Hamilton, Christopher W; Herd, Richard; Lodato, Luigi; Steffke, Andrea.

In: Geophysical Research Letters, Vol. 34, No. 19, L19303, 16.10.2007.

Research output: Contribution to journalArticle

Harris, Andrew J L ; Dehn, Jonathan ; James, Mike R. ; Hamilton, Christopher W ; Herd, Richard ; Lodato, Luigi ; Steffke, Andrea. / Pāhoehoe flow cooling, discharge, and coverage rates from thermal image chronometry. In: Geophysical Research Letters. 2007 ; Vol. 34, No. 19.
@article{0b85119567a442d39dcea24545fc9848,
title = "Pāhoehoe flow cooling, discharge, and coverage rates from thermal image chronometry",
abstract = "Theoretically- and empirically-derived cooling rates for active pāhoehoe lava flows show that surface cooling is controlled by conductive heat loss through a crust that is thickening with the square root of time. The model is based on a linear relationship that links log(time) with surface cooling. This predictable cooling behavior can be used assess the age of recently emplaced sheet flows from their surface temperatures. Using a single thermal image, or image mosaic, this allows quantification of the variation in areal coverage rates and lava discharge rates over 48 hour periods prior to image capture. For pāhoehoe sheet flow at Kīlauea (Hawai'i) this gives coverage rates of 1-5 m2/min at discharge rates of 0.01-0.05 m3/s, increasing to ∼40 m2/min at 0.4-0.5 m3/s. Our thermal chronometry approach represents a quick and easy method of tracking flow advance over a three-day period using a single, thermal snap-shot.",
author = "Harris, {Andrew J L} and Jonathan Dehn and James, {Mike R.} and Hamilton, {Christopher W} and Richard Herd and Luigi Lodato and Andrea Steffke",
year = "2007",
month = "10",
day = "16",
doi = "10.1029/2007GL030791",
language = "English (US)",
volume = "34",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "19",

}

TY - JOUR

T1 - Pāhoehoe flow cooling, discharge, and coverage rates from thermal image chronometry

AU - Harris, Andrew J L

AU - Dehn, Jonathan

AU - James, Mike R.

AU - Hamilton, Christopher W

AU - Herd, Richard

AU - Lodato, Luigi

AU - Steffke, Andrea

PY - 2007/10/16

Y1 - 2007/10/16

N2 - Theoretically- and empirically-derived cooling rates for active pāhoehoe lava flows show that surface cooling is controlled by conductive heat loss through a crust that is thickening with the square root of time. The model is based on a linear relationship that links log(time) with surface cooling. This predictable cooling behavior can be used assess the age of recently emplaced sheet flows from their surface temperatures. Using a single thermal image, or image mosaic, this allows quantification of the variation in areal coverage rates and lava discharge rates over 48 hour periods prior to image capture. For pāhoehoe sheet flow at Kīlauea (Hawai'i) this gives coverage rates of 1-5 m2/min at discharge rates of 0.01-0.05 m3/s, increasing to ∼40 m2/min at 0.4-0.5 m3/s. Our thermal chronometry approach represents a quick and easy method of tracking flow advance over a three-day period using a single, thermal snap-shot.

AB - Theoretically- and empirically-derived cooling rates for active pāhoehoe lava flows show that surface cooling is controlled by conductive heat loss through a crust that is thickening with the square root of time. The model is based on a linear relationship that links log(time) with surface cooling. This predictable cooling behavior can be used assess the age of recently emplaced sheet flows from their surface temperatures. Using a single thermal image, or image mosaic, this allows quantification of the variation in areal coverage rates and lava discharge rates over 48 hour periods prior to image capture. For pāhoehoe sheet flow at Kīlauea (Hawai'i) this gives coverage rates of 1-5 m2/min at discharge rates of 0.01-0.05 m3/s, increasing to ∼40 m2/min at 0.4-0.5 m3/s. Our thermal chronometry approach represents a quick and easy method of tracking flow advance over a three-day period using a single, thermal snap-shot.

UR - http://www.scopus.com/inward/record.url?scp=37249032014&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=37249032014&partnerID=8YFLogxK

U2 - 10.1029/2007GL030791

DO - 10.1029/2007GL030791

M3 - Article

AN - SCOPUS:37249032014

VL - 34

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 19

M1 - L19303

ER -