Paper 17 



Off Lo 

 c on cen 

 summer 

 New J e 

 L ong I 

 Oxygen 

 more r 

 during 

 d 1 s c h 3 

 in 197 

 one to 



N 



mo 



t 



Jo 



off 



two 



for 



for 



along 



Given 



spring 



I s I and 



ng IsLandr as off New Jersey/' maxim 

 trations normally occur in March/^ deer 

 r and begin rising in September. Similar 

 rsey Shelf Watersx the annual cycle of di 

 sland reflects the seasonality of densit 

 decrease in this 1-deg square off Lo 

 apidly during spring than off New Jersey^ 



summer (Fig. I7.5a). Sea surface 

 rge rates into Long Island Sound and from 

 6 indicate that stratification should hav 



two months earlier than normal off Long 

 ew Jersey. Assuming that stratification 

 nths earlier than normals a trend for 19 

 he waters off Long Islandir beginning with 

 nuary (6.5 ml/l). This curve is shown 



with the one formulated for New Jer 



sin, ilar anomslous events for the two area 



and comparable Ceratiym bloom)/ bott 



should not have gone mjch belo^ 2 ml/l i 



um bottom oxygen 



ease in spring and 



to the cycle in 



ssolved oxygen off 



y stratification. 



ng Is land proceeds 



but less rapidly 



temperatures and 



t he Hudson River 



e been established 



I s land , as it was 



became established 



76 was deve loped 



t he t yp i ca I value 



in Figure 17. 5b/^ 



sey bottom waters. 



s (two-month-early 



om oxygen off Long 



n 1976. 



The 



be tw 



cond 



A s 



s h a I 



bank 



t ypi 



off 



less 



Auau 



of" t 



New 



off 



Lone 



cone 



typi 



New 



ciff 

 een 

 i t io 

 ini i I 

 lowe 

 of 

 ca II 

 New 

 er V 

 St 1 



he p 

 J er 

 New 



Is 

 ent r 



Cell 



J e rs 



e ren 

 the 

 n s . 

 a r 

 r . 



f Ne 



y oc 



Je 



lum 

 949, 

 y cno 

 sey 



J er s 



1 and 

 at io 

 y a V 

 ey. 



ce s 

 tw 



H b 

 bank 

 The 

 w J e 

 cu r s 

 rsey 

 e of 



a c 

 c L i n 

 and 

 ey w 



ns / 

 ai I a 



1 n 



ar 



road 



i s 



anox 



rsey 



(Fi 



wou 



oxy 



ru i s 



e at 



Long 



as o 



Appl 



it c 



ble 



the a 



eas mo 



bank 



prese 



i c con 



r uh i c 



q. 17. 



Id hav 



gen, t 



e that 



a dep 



I s I an 



n ly ab 



yi ng 



ou Id b 



below 



nnua I 

 St li 

 (40-6 

 nt of 

 di t i 

 h is 

 1) . 

 e a I 

 han t 

 t r an 

 th of 

 d. T 

 out 1 

 the 

 e a rq 

 the p 



eye le 

 ke ly ar 



3 ill dep 

 f New J 

 n in 19 

 the reg 

 The thi 

 esse r v 

 he wate 

 s i tt ed 

 about 

 h i cknes 

 5 m, wh 

 ratio 

 ued tha 

 ycno c li 



of 

 e the 

 th) e 

 e r sey 

 76 de 

 ion w 

 nne r 

 o lume 

 r s o 

 both 

 25 m 

 s of 

 e re as 

 of t 

 t twi 

 n e of 



oxy 



res 



xi St 



r bu 



ve lo 

 here 



sub 



of 

 f f 



a rea 

 over 

 the 



it 

 hese 

 ce a 

 f Lo 



gen 

 ult 

 s of 

 t it 

 ped 



the 

 pycn 

 wate 

 Long 

 s f o 



the 

 bott 

 was 



va 

 s mu 

 ng I 



conee 

 of bat 

 f Long 



is ab 

 on the 



lowes 



oc li ne 



r / and 



Isla 



und t h 



banks 

 om wa t 

 about 

 lues t 

 eh ox 

 s I and 



ntr a 

 hyme 



Isl 

 out 



sha 



t ox 



wa 



hen 

 nd. 

 e bo 



of 

 er I 

 30 m 

 o ox 

 ygen 

 than 



t ion 

 trie 

 and . 

 20 m 

 How 

 ygen 

 t e r s 

 ce a 

 In 

 1 1 om 

 both 

 ay er 



off 



ygen 



i s 



off 



Shelf Waters south of New Jersey (off the Delmarva Peninsula) 

 also experienced early warming in 1976 ana would probably be 

 unaer influence of the early, high river discharge. The lack of 

 fish kills and anoxic conditions in this area in 1976 also is 

 attributed to bathymetric differences. Off the Delmarva 

 Peninsula the continental shelf is only about half as wide as off 

 New Jersey and Long Island, which allows for greater cross-shelf 

 exchange and oxygen replenishment. Historic observations in the 

 NODC archives for the waters off the Delmarva Peninsula were too 

 few to develop an annual cycle of bottom oxygen. 



293 



