Regional areas and counts in RGI 6.0 and RGI 7.0

Areas and counts

The table below summarizes the glacier area and count of each first-order region and their differences (in %) between RGI 6.0 and RGI 7.0. Small differences in area or counts do not necessarily mean no changes in outlines quality; see Area changes below as well as each region’s documentation for details.

Summary table

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	Area RGI 6.0 (km²)	Area RGI 7.0 (km²)	Area Diff. (%)	Count RGI 6.0	Count RGI 7.0	Count Diff. (%)
01: Alaska	86725	86708	0.0	27108	27509	1.5
02: Western Canada and USA	14524	14521	0.0	18855	18730	-0.7
03: Arctic Canada North	105111	105370	0.2	4556	5216	14.5
04: Arctic Canada South	40888	40538	-0.9	7415	11009	48.5
05: Greenland Periphery	89717	90482	0.9	19306	19994	3.6
06: Iceland	11060	11060	0.0	568	568	0.0
07: Svalbard and Jan Mayen	33959	33959	0.0	1615	1666	3.2
08: Scandinavia	2949	2948	0.0	3417	3410	-0.2
09: Russian Arctic	51592	51595	0.0	1069	1069	0.0
10: North Asia	2410	2643	9.6	5151	7155	38.9
11: Central Europe	2092	2124	1.5	3927	4079	3.9
12: Caucasus and Middle East	1307	1407	7.6	1888	2275	20.5
13: Central Asia	49303	50344	2.1	54429	75613	38.9
14: South Asia West	33568	33075	-1.5	27988	37562	34.2
15: South Asia East	14734	16049	8.9	13119	18587	41.7
16: Low Latitudes	2341	1929	-17.6	2939	3695	25.7
17: Southern Andes	29429	27674	-6.0	15908	30634	92.6
18: New Zealand	1162	886	-23.7	3537	3018	-14.7
19: Subantarctic and Antarctic Islands	132867	133432	0.4	2752	2742	-0.4
20: Antarctic Mainland	0	0	0.0	0	0	0.0
Global	705739	706744	0.1	215547	274531	27.4

Area changes

The table below summarizes the area changes by first computing the overlap between RGI 6.0 and RGI 7.0 (Area overlap: areas that were classified as glaciers in both datasets). To compute the area that has been remapped as “no glacier” in RGI 7.0 (Area removed from RGI 6.0), we subtract the overlap from the original RGI 6.0 regional area. Similarly, to compute the area that was previously unmapped but is now classified as “glacier” in RGI 7.0 (Area added in RGI 7.0), we subtract the overlap from the total RGI 7.0 regional area.

A region with a total area change close to 0% can still have substantial internal changes in glacier outlines, for example by correcting georeferencing issues (shifted outlines).

Detailed area changes table

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	Area RGI 6.0 (km²)	Area RGI 7.0 (km²)	Area Diff. (%)	Area overlap (km²)	Area removed from RGI 6.0 (km²)	Area added in RGI 7.0 (km²)	Area removed from RGI 6.0 (%)	Area added in RGI 7.0 (%)
01: Alaska	86725	86708	0.0	86627	98	81	0.1	0.1
02: Western Canada and USA	14524	14521	0.0	14521	3	0	0.0	0.0
03: Arctic Canada North	105111	105370	0.2	102891	2220	2479	2.1	2.4
04: Arctic Canada South	40888	40538	-0.9	39927	961	611	2.4	1.5
05: Greenland Periphery	89717	90482	0.9	89546	171	936	0.2	1.0
06: Iceland	11060	11060	0.0	11060	0	0	0.0	0.0
07: Svalbard and Jan Mayen	33959	33959	0.0	33938	21	21	0.1	0.1
08: Scandinavia	2949	2948	0.0	2899	50	49	1.7	1.7
09: Russian Arctic	51592	51595	0.0	51591	1	4	0.0	0.0
10: North Asia	2410	2643	9.6	2114	296	529	12.3	20.0
11: Central Europe	2092	2124	1.5	2081	11	43	0.5	2.0
12: Caucasus and Middle East	1307	1407	7.6	970	337	437	25.8	31.1
13: Central Asia	49303	50344	2.1	46126	3177	4218	6.4	8.4
14: South Asia West	33568	33075	-1.5	30849	2719	2226	8.1	6.7
15: South Asia East	14734	16049	8.9	13433	1301	2616	8.8	16.3
16: Low Latitudes	2341	1929	-17.6	1802	539	127	23.0	6.6
17: Southern Andes	29429	27674	-6.0	25995	3434	1679	11.7	6.1
18: New Zealand	1162	886	-23.7	827	335	59	28.8	6.7
19: Subantarctic and Antarctic Islands	132867	133432	0.4	128955	3912	4477	2.9	3.4
20: Antarctic Mainland	0	0	0.0	0	0	0	0.0	0.0
Global	705739	706744	0.1	686151	19588	20593	2.8	2.9