mankoff / landsat-scene-plume-db

Landsat scene plume database

Table of contents

• Introduction
  • Code
• Reference
• Database format

Introduction

We have examined 3335 Landsat 8 scenes from 2013 through 2016 (work initially done in 2017) at Greenlandic glacier termini for the surface signature of subglacial discharge plumes - small muddy brown pools indicating where submarine subglacial discharge rises buoyantly to the surface. Where plume surface pools are sometimes present, we have classified that location (lon,lat, scene ID) as “plume”, and that approximate location in all other scenes in the database as one of “plume” (may be surrounded by ice or water), “water” (no plume) “ice” (no plume), or “cloud” (unknown).

From the 3335 scenes, there are 10878 classifications because most scenes cover several fjords, and glacier termini may have more than one plume. Of the 10878 classification, they are 2985 cloud, 4281 ice, 1835 plume, and 1777 water.

Code

• ./GEE_browse_DB.js is a Google Earth Engine snippet that, when manually fed one line from the DB, will display that scene at that location.
• ./GEE_browse_scenes.js is the Google Earth Engine snippet used to browse all scenes and click to classify the point of interest.

Reference

In preparation to the GEUS bulletin

Database format

row	Scene	Lat	Lon	Comment
0	LC80020172013148LGN00	61.199488225361	-45.204963684082	cloud
1	LC82330172013230LGN00	61.1953529618127	-45.1980972290039	plume
2	LC80010172013237LGN00	61.1940295628274	-45.2324295043945	cloud
3	LC80020172013244LGN00	61.1943604177853	-45.2015304565429	ice
4	LC82330172013246LGN00	61.1942115332318	-45.1955223083496	ice
5	LC80010172013269LGN00	61.1953033348491	-45.2006721496582	ice
6	LC80020172013276LGN00	61.1942280757142	-45.1972389221191	plume