Leading 25 science cities in Earth & environmental sciences

The leading 25 science cities and metropolitan areas in Earth & environmental sciences ranked by article share (Share) in 2020. Also listed are each city’s article count (Count) in 2020, and its contribution to the location’s total Share of the year.

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Rank	City/metropolitan area	Location	Share 2020	Count 2020	Contribution to location's Share (%)
1	Beijing	China mainland, Hong Kong, Macau	568.40	1,255	29.3%
2	Nanjing	China mainland, Hong Kong, Macau	245.24	530	12.7%
3	Baltimore - Washington	United States of America (USA)	236.92	728	8.3%
4	New York metropolitan area	United States of America (USA)	217.77	644	7.6%
5	Los Angeles metropolitan area	United States of America (USA)	171.58	498	6.0%
6	San Francisco Bay Area	United States of America (USA)	168.75	472	5.9%
7	Guangzhou	China mainland, Hong Kong, Macau	156.24	384	8.1%
8	Boston metropolitan area	United States of America (USA)	135.89	409	4.7%
9	Shanghai	China mainland, Hong Kong, Macau	132.17	333	6.8%
10	Boulder	United States of America (USA)	126.26	422	4.4%
11	Wuhan	China mainland, Hong Kong, Macau	123.79	308	6.4%
12	Zürich	Switzerland	122.52	322	59.8%
13	Paris metropolitan area	France	121.78	398	37.3%
14	Tokyo metropolitan area	Japan	102.61	289	39.4%
15	London metropolitan area	United Kingdom (UK)	75.91	296	14.4%
16	Sydney	Australia	75.15	228	23.8%
17	Berlin metropolitan area	Germany	74.89	221	17.6%
18	Hong Kong	China mainland, Hong Kong, Macau	72.54	186	3.7%
19	Seattle metropolitan area	United States of America (USA)	70.65	222	2.5%
20	Hangzhou	China mainland, Hong Kong, Macau	66.34	163	3.4%
21	Melbourne	Australia	63.01	194	19.9%
22	Hefei	China mainland, Hong Kong, Macau	58.85	162	3.0%
23	Seoul metropolitan area	South Korea	55.61	120	51.5%
24	Toronto metropolitan area	Canada	55.22	141	18.1%
25	Singapore*	Singapore	54.70	112	100.0%

Footnote

* Singapore is a city-state.