Skip to main content

Advertisement

Log in

Color and temperature of the crater lakes at Kelimutu volcano through time

  • Research Article
  • Published:
Bulletin of Volcanology Aims and scope Submit manuscript

Abstract

We investigated the color and temperature of three volcanic crater lakes that co-exist at Kelimutu volcano (Indonesia) using ~ 30 years of Landsat data. These satellite data were obtained through Google Earth Engine. Time series of surface reflectance (visible wavelengths) and brightness temperature above background (thermal infrared wavelengths) were calculated. Color was defined in the RGB (red-green-blue) and HSV (hue-saturation-value) color spaces, and we introduce a visualization concept called “hue stretch” to consistently represent hue through time. These parameters display long-term trends, seasonal cycles and short duration bursts of activity at the lakes. We demonstrate that the color of the lakes are related over a period of months to years and discovered a previously unreported but significant episode around 1997, which included large agglomerations of floating elemental sulfur. Globally speaking, these techniques could reveal trends at any of the ~ 100 crater lakes on active volcanoes. Furthermore, they could apply to any target whose color changes through time (e.g., forests, crops, and non-volcanic water bodies). We have open-sourced the code necessary to perform these analyses.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11

Similar content being viewed by others

References

Download references

Acknowledgments

We would like to thank Jean Vandemeulebrouck, Andrew Harris, Takeshi Nishimura, and an anonymous reviewer for their help in significantly improving the cogency of this article.

Funding

SM and RW were funded by NASA grant NN14AP34G.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Sam Murphy.

Additional information

Editorial responsibility: T. Nishimura

Electronic supplementary material

Below is the link to the electronic supplementary material.

(KML 4.29 KB)

(XLSX 70.8 KB)

(XLSX 77.5 KB)

(XLSX 72.7 KB)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Murphy, S., Wright, R. & Rouwet, D. Color and temperature of the crater lakes at Kelimutu volcano through time. Bull Volcanol 80, 2 (2018). https://doi.org/10.1007/s00445-017-1172-2

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s00445-017-1172-2

Keywords

Navigation