Data of the AARI and of the National Oceanographic Data Center- World Data Center - A(NODC) were used for creation of the complete historical data set of Russian and western observations. The NODC data set was collected from different sources including the Russian ones. Information on metadata is given in Appendix 2.

ASCII-file AO_chem.txt contains next hydrochemical observations data columns during 1948-2000 years. The data columns divided with tab symbol in this file

Number of column

Name of column in file (As seen in first row of file AO_chem.txt)

Parameters and discription

Format

1

Cruise

Expedition (cruise) or code of expedition

(cruise)

Symbol (max lenght of 19 positions)

2

Station

Number of station in cruise

Symbol(max lenght of 8 positions)

3

Type

Type of station

(Â - bathometric;

C- CTD–sounding)

Symbol (max lenght of 1 positions)

4

mon/day/yr

Data of observation (month/day/year)

MM/DD/YYYY

(MM-month;

DD-day;

YYYY-year)

(always 10 positions)

5

Lon (°E)

Longtitude of station

(integer degrees and

one hundred thousands

part of degrees

measured in 360 degrees system)

DDD.ddddd

(DD-integer degrees;

ddddd- one hundred thousands

part of degrees )

6

Lat (°N)

Latitude of station

(integer degrees and

one hundred thousands

part of degrees)

DDD.ddddd

(DD-integer degrees;

ddddd- one hundred thousands

part of degrees

7

Bot. Depth [m]

Bottom Depth[m]

HHHH.h

(HHHH-integer meters;

h-tens part of meters).

The value 9999.9 is

Absence data of bot.depth at station

8

Depth [m]

Depth of observation [m]

LLLL.l

(LLLL- integer meters;

l-tens part of meters) .

9

QF

Flag of reliability depth observation value

 

Integer (everywhere are 1 as uknown

10

Oxygen [ml/l]

Value of disolved

Oxygen [ml/l]

On the depth of observation

PP.ppppp

(PP-integer;

ppppp-ten thousands parts ).

Symbol of blank space

is an absence data observation hydrochemical parameter

at this depth

11

QF

Flag of reliability value of oxygen observation value

Integer (everywhere is 1 as unknown)

12

Phosphate [~$m~#mol/l]

The value of phosphate [m mol/l] on depth of observation

PP.pppppppp

(PP-integer;

pppppppp-one hundred millions parts).

Blank space symbol is

absence data observation hydrochemical parameter

at this depth .

13

QF

Reliability flag of phosphate value

Integer (everywhere is 1 as unknown)

14

Silicate [~$m~#mol/l]

The values of dissolved

Silicate [m mol/l] at observation depth

 

 

PPP.pppppppp

(PP-integer; pppppppp- one hundred millions parts).

Blank space symbol is

absence data observation hydrochemical parameter

at this depth .

15

QF

Reliability flag of silicate value

Integer (everywhere is 1 as unknown)

16

Nitrate [~$m~#mol/l]

The values of dissolved

Nitrate [m mol/l] at observation depth

 

 

 

 

 

 

 

 

PP.ppppppppp

(PP-integer;

ppppppppp-one milliards parts).

Blank space symbol is

absence data observation hydrochemical parameter

at this depth .

17

QF

Reliability flag of nitrate value

Integer (everywhere is 1 as unknown)

18

Nitrite [~$m~#mol/l]

The values of dissolved

Nitrite [m mol/l] at observation depth

PP.pppppppp

(PP-integer;

pppppppp- one hundred millions parts).

Blank space symbol is

absence data observation hydrochemical parameter

at this depth .

19

QF

Reliability flag of nitrite value

Integer (everywhere is 1 as unknown)

20

pH~_B~# [pH units by Buch]

The values of hydrogen indicator

pHB [accounting unit pH by Buch]

P.ppp

(PP-integer;

ppp-one thousands parts).

Blank space symbol is

absence of data observation hydrochemical parameter

at this depth .

21

QF

Reliability flag of hydrogen indicator value

Integer (everywhere is 1 as unknown)

22

Alkalinity [mg-eq/l]

The values of alkalinity [mg-eq/l]

at depth observation

 

 

P.pppp

(P-integer;

pppp-ten thousands parts).

Blank space symbol is

absence of data observation hydrochemical parameter

at this depth

23

QF

Reliability flag of alkalinity value

Integer (everywhere is 1 as unknown)