Chemical symbols

Symbol

Description

Units

a

activity

mol l-1

c

concentration

mol l-1

eq

equivalents

eq l-1

I

ionic strength

mol l-1

IAP

ion activity product

mol" l-"

K

equilibrium constant

mol" l-"

K'

first dissociation constant

mol" l-"

Ka

equilibrium constant for acid

mol" l-"

Kb

equilibrium constant for base

mol" l-"

Kh

Henry's law constant

mol l-1 atm

Ksp

solubility product

mol" l-"

Kw

equilibrium constant for water

mol21-2

mol

mole (amount of substance - see Section 2.5)

P

partial pressure

atm

General

symbols and abbreviations

Symbol

Description

A

total amount of gas in atmosphere

(aq)

aqueous species

atm

atmosphere (pressure)

ATP

adenosine triphosphate

B[a]P

benzo[a]pyrene

°C

degrees Celsius (temperature)

CCD

calcite compensation depth

CCN

cloud condensation nuclei

CDT

Canyon Diablo troilite

CEC

cation exchange capacity

CFC

chlorofluorocarbon

CIA

chemical index of alteration

D

deuterium

DDT

2,2-bis-(p-chlorophenyl)-1,1,1-trichloroethane

DIC

dissolved inorganic carbon

DIP

dissolved inorganic phosphorus

DMS

dimethyl sulphide

DMSP

beta-dimethylsulphoniopropionate

DNA

deoxyribonucleic acid

DSi

dissolved silicon

standard electrode potential (V)

e

electron

Eh

redox potential (V)

EPA

Environmental Protection Agency

F

flux

FACE

free-air CO2 enrichment

FAO

Food and Agriculture Organization

Fs

furans

G

Gibbs free energy (kJ mol-1)

g

gram (weight)

(g)

gas

GEOSECS

US geochemical ocean sections programme

GtC

gigatonnes expressed as carbon

H

scale height

H

enthalpy (J mol-1)

HCFCs hydrochlorofluorocarbons

HCH hexachlorocyclohexane hv photon of light

IAP ion activity product

IGBP International Geosphere-Biosphere Programme

IPCC Intergovernmental Panel on Climate Change

J joule (energy, quantity of heat)

K kelvin (temperature)

l litre (volume)

(l) liquid ln natural logarithm log,o base 10 logarithm m metre (length)

M a third body

MSA methanesulphonic acid

N neutron number n an integer

NAPL non-aqueous phase liquid

Pa pascal (pressure)

PAH polycyclic aromatic hydrocarbon

PAN peroxyacetylnitrate

PCBs polychlorinated biphenyls

PCDD polychlorinated dibenzo-p-dioxin

PCDF polychlorinated dibenzo-p-furan

PCP pentachlorophenol

PM particulate matter

POP persistent organic pollutant ppb parts per 109

ppm parts per million r ionic radius

s second (time)

SOM soil organic matter

SRB sulphate reducing bacteria

SVOC semi-volatile organic compound

T absolute temperature (kelvin)

TBT tributyl tin

TCA tricarboxylic acid

TDIC total dissolved inorganic carbon

UNESCO United Nations Educational, Scientific and Cultural Organisation

USDA United States Department of Agriculture

UV ultraviolet (radiation)

V volt (electrical potential)

V volume

W

watt (power - Js-1)

WHO

World Health Organization

wt%

weight per cent

Z

atomic number

z

charge

\z\

charge ignoring sign

0 0

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