Extended Data Fig. 4: Random subset results for the Alaska geographic study regions. | Nature Climate Change

Extended Data Fig. 4: Random subset results for the Alaska geographic study regions.

From: Remote sensing northern lake methane ebullition

Extended Data Fig. 4

We show the frequency distributions of the lake-area-weighted mean ebullition fluxes of lakes randomly and repeatedly selected (with no replacement) from all lakes in the SAR scene. We iteratively selected the same number of lakes (n) that we had field data from for our study regions: (a) Barrow Peninsula, n = 5; (b) Atqasuk, n = 7; (c) Toolik n = 9; (d) northern Seward Peninsula n = 11; (e) Fairbanks Yedoma n = 13; (f) Fairbanks Anthropogenic, n = 3 from all lakes in each region, then calculated the regional flux based on the n lakes’ weighted mean SAR values. This approach revealed large variability in the regional lake ebullition estimates when using a small sample size of lakes. Data were binned in 0.5 L gas m−2 yr−1 bins. The blue star represents the field-based flux estimated through field work conducted on n specific lakes. The yellow star indicates the SAR-based flux from all lakes in the SAR scene (see Table 1). Note logarithmic scale for y-axis for the Atqasuk region.

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