Table 2.

A review of parameterizations provided for the relationship between N_d and N_a

Region	a	β	r	Highest Na(cm−3)	Study
Northeast Pacific	7.73	0.56	0.78	500	This study (non-BB)
Northeast Pacific	33.25	0.26	0.70	1,800	This study (BB)
Around the British Isles and over the Atlantic near the Azores Islands	14	0.26	0.95	12,000	Raga and Jonas (1993)
Houston and the northwestern Gulf Of Mexico	33.3	0.26	0.66	11,000	Lu et al. (2008)
Vicinity of Houston, TX	36.3	0.35	N/A	10,000	Jiang et al. (2008)
Southeast Pacific	7.7	0.55	0.89	600	Terai et al. (2012)
Northeast Atlantic and North Pacific	2.75	0.73	N/A	400	O'Dowd et al. (1999)a
Northeast Pacific	1.03	0.96	0.95	500	Twohy et al. (2005)b
Pacific offshore of California, Chile, and Atlantic offshore of Namibia	13.39	0.51	0.94	700	Hegg et al. (2012)c

Note. All mentioned parameterizations are from studies based on in situ measurements. Reported α and β values are either reported directly from a power law relationship or were derived from a different type of parameterization by power law fitting. Values reported in the r column belong to the original form of equations and N/A values denote that no correlation coefficient was provided by a particular study.

^aOriginally presented in form of N_d = 197 (1 – exp(−6.13× 10⁻³ N_a)).

^bOriginally presented in form of N_d = −2.2 + 1.027 N_a − 0.000837 N_a².

^cOriginally presented in form of N_d = 0.72 N_a + 47.