(Supporting material) Data of activity concentration of 210Pbex in 6 sediment cores taken from Ha Long Bay in dry season (Mar 2013) and the SR estimate of in different sites.

Table S1: (Supporting material) Data of activity concentration of 210Pbex in 6 sediment cores taken from Ha Long Bay in dry season (Mar 2013) and the SR estimate of in different sites.

Sampling	Coordinate			Total ²¹⁰Pb		²¹⁰Pb_ex		Age, y		SR		Year
site	Latitude	Longitude	Bq kg^-1		Bq kg^-1				cm a^-1
HL1	20°59' 65N	106°53' 62E
-2			81.2		71.19		2		2.08		2013
-4			86.0		66.02		4		1.67		2011
-6			118.7		70.68		7		1.18		2009
-8			88.6		68.61		9		1.14		2006
-10			99.6		69.55		12		1.00		2004
-12			73.0		63		14		0.97		2001
-14			61.5		51.45		17		0.95		1999
-16			86.7		66.68		20		0.89		1996
-18			78.1		68.06		24		0.84		1993
-20			86.5		56.48		28		0.78		1989
-22			59.3		51.26		31		0.77		1985
-24			54.7		44.66		34		0.76		1982
-26			73.4		53.42		38		0.74		1979
-28			69.9		59.9		44		0.69		1975
-30			69.1		59.12		50		0.63		1969
-32			44.2		34.17		54		0.63		1963
-34			38.8		28.76		58		0.62		1959
-36			55.6		50.62		66		0.57		1955
-38			39.3		36.3		73		0.55		1947
-40			59.7		49.67		87		0.53		1940
-42			47.3		37.29		103		0.53		1926
-44			44.1		24.05						1910
HL2	20° 56'32N	106° 55'80E
-4			75.2		63.1		7		0.54		2006
-8			77.5		61.4		17		0.48		1996
-12			42.4		34.4		23		0.51		1990
-16			46.3		37		32		0.49		1981
-20			15.7		18.7		38		0.52		1975
-24			25.6		15.1		43		0.55		1970
-28			34.2		24.3		55		0.51		1958
-32			27.6		18.6		66		0.48		1947
-36			25.1		15.9		82		0.44		1931
-40			19.3		9.4		95		0.42		1918
-48			18.5		9.4		119		0.40		1894
HL3	20°56'14N	106°56'008E
-2			63.4		23.4		7		0.58		2006
-4			50.74		22.74		14		0.43		1999
-6			39.4		32.83		19		0.42		1994
-8			27.5		20.25		23		0.43		1990
-10			38.6		28.54		29		0.41		1984
-12			15.8		9.03		32		0.44		1981
-14			25.7		15.5		36		0.44		1977
-16			27.3		14.55		41		0.44		1972
-18			25.2		8,32		44		0.45		1969
-20			20.1		8,99		47		0.47		1966
-22			17.3		5,25		49		0.49		1964
-24			25.8		12,33		56		0.47		1957
-26			27.4		20,54		70		0.40		1943
-28			17.6		8,85		78		0.38		1935
-30			29.4		11.65		80		0.49		1933
-32			35.7		16.86
HL4	20°55'67N	106°57'46E
-2			61.2		51.2		6		0.71		2010
-4			42.4		32.6		11		0.64		2007
-6			28.13		18.23		15		0.53		2002
-8			35.2		28.13		20		0.52		1998
-10			29.1		19.66		23		0.51		1993
-12			24.7		17.54		27		0.50		1990
-14			32.1		24.31		32		0.48		1986
-16			30.6		24.01		39		0.47		1981
-18			37.5		23.3		47		0.46		1974
-20			34.2		27.03		61		0.42		1966
-22			25.4		16.38		73		0.36		1952
-24			27.4		23.69		106		0.33		1940
-26			19.4		12.84				0.3		1907
HL5	20°59'30N	106°53'48N
-2			77.5		67.8		8		0.29		2005
-6			65.2		54.9		11		0.55		2002
-6			53.1		47.1		12		0.64		2001
-8			46.5		38.6		17		0.60		1996
-10			56.7		49.6		20		0.60		1993
-12			43.8		34.7		27		0.53		1986
-14			59.2		57.9		33		0.49		1980
-16			54.1		44.7		38		0.47		1975
-18			39.3		33.5		42		0.48		1971
-20			29.3		16.9		46		0.48		1967
-22			31.2		19.9		48		0.50		1965
-24			25.3		17.6		51		0.51		1962
-26			19.2		11.7		54		0.52		1959
-28			22.1		11.9		58		0.52		1955
-30			28.2		13.1		64		0.50		1949
-32			28.5		15.4		73		0.47		1940
-34			27.7		20.6		83		0.44		1930
-36			28.2		16		93		0.41		1920
-38			24.5		12.1		105		0.38		1908
-40			20.1		10.5		117		0.36		1896
-42			15.9		6.6
HL6
-4	20°56'32N	106°55'80E	62.6		32.61		16		0.43		1997
-6			40.8		30.76		28		0.37		1985
-8			28.4		18.44		39		0.28		1974
-10			30.1		20.29		57		0.26		1956
-14			16.5		6.53		65		0.25		1948
-16			7.4		3.43		79		0.25		1934
-18			16.4		6.37		100		0.23		1913
-20			10.2		7.2		110		0.24		1903