GLOSS Core Network

The backbone of the global tide gauge network is the GLOSS Core Network, a global set of 290 tide gauge stations that provide optimal sampling of the global ocean for a range of oceanographic applications. GLOSS Core Network gauges are allocated to each island or group of islands at intervals not closer than 500 km, and along continental coasts at intervals generally not less than 1000 km. Preference has been given to islands in order to maximize exposure to the open ocean.

Operation and maintenance of the GLOSS Core Network satisfies nearly the full range of research and operational requirements for the global sea-level network, and commitment to the GLOSS Core Network is a main requirement for Member States participating in the GLOSS programme. The goal for the GCN is to be 100% operational. A list of the GLOSS Core Network stations is shown below together with a map of their locations.

The GLOSS Core Network has been complemented by the definition of regional sets of gauges in several parts of the world, providing an extension and local densification of the Core Network. Although arrangements may differ in each case, one would envisage in future each regional activity having its own methods of coordination, local workshops and products, and international data centre, in addition to representation within the GLOSS Group of Experts. Regional GLOSS networks are encouraged to expand, particularly in partnership with the regional tsunami warning systems or the GOOS Regional Alliances.

GLOSS Core Network (GCN)

Global set of the 290 GCN tide gauge stations

GLOSS Core Network station list

GLOSS No.

Station Name

Country or Territory

Latitude

Longitude

144

Pago Pago, American Samoa

American Samoa

-14.283

-170.683

262

Lobito

Angola

-12.333

13.567

185

Bahia Esperanza

Antarctica

-63.3

-56.917

189

Capitan Prat Base (Antarctica)

Antarctica

-62.29

-59.38

278

Casey

Antarctica

-66.283

110.533

277

Davis

Antarctica

-68.45

77.967

131

Dumont D'urville

Antarctica

-66.662

140.01

22

Mawson

Antarctica

-67.6

62.867

25

Mirny (Antarctica)

Antarctica

-66.55

93.017

342

Rothera

Antarctica

-67.572

-68.128

134

Scott Base

Antarctica

-77.51

166.46

95

Syowa

Antarctica

-69

39.6

188

Vernadsky (Faraday), Argentine Is.

Antarctica

-65.25

-64.267

192

Mar Del Plata

Argentina

-38.05

-57.55

190

Puerto Deseado

Argentina

-47.75

-65.917

191

Puerto Madryn

Argentina

-42.767

-65.033

181

Ushuaia

Argentina

-54.817

-68.3

61

Booby Island

Australia

-10.6

141.917

58

Brisbane (West Inner Bar)

Australia

-27.367

153.167

40

Broome

Australia

-18

122.217

59

Bundaberg, Burnett Heads

Australia

-24.767

152.38

52

Carnarvon

Australia

-24.9

113.65

62

Darwin

Australia

-12.467

130.85

54

Esperance

Australia

-33.867

121.9

53

Fremantle

Australia

-32.05

115.733

148

Lord Howe Island

Australia

-31.517

159.067

130

Macquarie Island

Australia

-54.5

158.933

51

Port Hedland

Australia

-20.317

118.567

55

Portland

Australia

-38.343

141.613

56

Spring Bay

Australia

-42.55

147.933

57

Sydney, Fort Denison

Australia

-33.85

151.233

308

Thevenard

Australia

-32.15

133.64

60

Townsville

Australia

-19.25

146.833

12

Exuma

Bahamas

23.783

-76.1

211

Settlement Point

Bahamas

26.717

-78.983

36

Chittagong

Bangladesh

22.333

91.833

221

Bermuda, St. Georges Is.

Bermuda

32.367

-64.7

194

Cananeia

Brazil

-25.017

-47.933

198

Fernando De Noronha

Brazil

-3.833

-32.4

336

Fortaleza

Brazil

-3.717

-38.467

265

Ilha Da Trindade

Brazil

-20.5

-29.3

200

Ponta Da Madeira

Brazil

-2.567

-44.367

351

Porto De Imbituba

Brazil

-28.23

-48.65

352

Porto De Macao

Brazil

-22.385

-41.77

193

Porto Do Rio Grande

Brazil

-32.1

-52.103

195

Rio De Janeiro - Ilha Fiscal

Brazil

-22.9

-43.167

334

Salvador

Brazil

-12.967

-38.517

199

St Peter & St Paul Rocks

Brazil

0.917

-29.35

26

Diego Garcia Is.

British Indian Ocean Territory

-7.283

72.4

350

Port Sonara

Cameroon

4.005

9.125

333

Alert

Canada

82.5

-62.317

222

Halifax

Canada

44.667

-63.583

224

Nain

Canada

56.55

-61.7

155

Prince Rupert

Canada

54.317

-130.333

223

St. John’s, Newfoundland

Canada

47.567

-52.717

156

Tofino

Canada

49.15

-125.917

329

Palmeira

Cape Verde

16.755

-22.983

174

Antofagasta

Chile

-23.39

-70.24

176

Juan Fernandez Island

Chile

-33.37

-78.5

137

Pascua (Easter) Island

Chile

-27.15

-109.45

178

Puerto Montt

Chile

-41.29

-72.58

177

San Felix

Chile

-26.17

-80.07

175

Valparaiso

Chile

-33.033

-71.617

94

Kanmen

China

28.083

121.283

79

Laohutan (Dalian)

China

38.867

121.683

283

Lusi

China

32.133

121.617

247

Xiamen

China

24.45

118.067

78

Zhapo

China

21.583

111.833

47

Christmas Island

Christmas Island

-10.417

105.667

46

Cocos Island (Keeling)

Cocos (Keeling) Islands

-12.1

96.9

170

Buenaventura

Colombia

3.9

-77.1

207

Cartagena

Colombia

10.4

-75.55

171

Tumaco

Colombia

1.833

-78.733

261

Pointe-Noire

Congo

-4.783

11.833

143

Penrhyn

Cook Islands

-8.59

-158.067

139

Rarotonga

Cook Islands

-21.2

-159.767

167

Quepos

Costa Rica

9.4

-84.167

214

Cabo San Antonio

Cuba

21.9

-84.9

276

Gibara

Cuba

21.117

-76.133

215

Siboney

Cuba

23.1

-82.467

257

Abidjan

Cote D'ivoire

5.25

-4

2

Djibouti

Djibouti

11.6

43.15

169

Baltra, Galapagos Islands

Ecuador

-0.433

-90.283

172

La Libertad

Ecuador

-2.2

-80.917

349

Alexandria

Egypt

31.217

29.917

1

Suez (Port Taufig)

Egypt

29.933

32.567

182

Acajutla

El Salvador

13.583

-89.833

305

Stanley, Falklands/Malvinas

Falkland Islands (Malvinas)

-51.75

-57.933

237

Torshavn, Faroe Islands

Faroe Islands

62.017

-6.767

122

Suva

Fiji

-18.133

178.433

242

Brest

France

48.383

-4.5

165

Clipperton Is.

France

10.283

-109.217

205

Marseille

France

43.3

5.35

202

Cayenne

French Guiana

4.85

-52.283

142

Nuku Hiva, Marquesas Is.

French Polynesia

-8.933

-140.083

140

Papeete, Tahiti

French Polynesia

-17.533

-149.567

138

Rikitea, Gambier

French Polynesia

-23.133

-134.95

21

Crozet Is.

French Southern Territories

-46.425

51.87

23

Kerguelen Is.

French Southern Territories

-49.345

70.22

24

Saint Paul Is.

French Southern Territories

-38.712

77.538

284

Cuxhaven, Steubenhoft

Germany

53.867

8.717

335

Takoradi

Ghana

4.883

-1.75

248

Gibraltar

Gibraltar

36.148

-5.365

228

Ammassalik, Greenland

Greenland

65.5

-37

225

Godthaab/Nuuk, Greenland

Greenland

64.167

-51.733

315

Ittoqqortoormiit/Scoresbysund, Greenland

Greenland

70.483

-21.967

343

Pituffik/Thule, Greenland

Greenland

76.55

-68.867

344

Qaqortoq, Greenland

Greenland

60.717

-46.033

149

Apra Hbr, Guam, Marianas

Guam

13.433

144.65

255

Conakry

Guinea

9.517

-13.717

209

Port-Au-Prince/Les Cayes

Haiti

18.567

-72.35

77

Quarry Bay

Hong Kong

22.283

114.217

229

Reykjavik

Iceland

64.15

-21.933

34

Chennai/Madras

India

13.1

80.3

32

Cochin

India

9.967

76.267

281

Marmagao

India

15.417

73.8

29

Minicoy, Laccadive Is.

India

8.283

73.05

38

Port Blair, Andaman Is.

India

11.683

92.767

31

Veraval

India

20.9

70.367

35

Vishakhapatnam

India

17.683

83.283

68

Ambon

Indonesia

-3.7

128.2

49

Benoa

Indonesia

-8.733

115.2

291

Cilacap

Indonesia

-7.567

108.983

69

Manado (Bitung)

Indonesia

1.433

125.2

45

Padang (Teluk Bayur)

Indonesia

-1

100.367

347

Sabang

Indonesia

5.833

95.333

292

Surabaya

Indonesia

-7.217

112.733

346

Waikelo

Indonesia

-9.383

119.217

337

Chabahar

Iran, Islamic Republic Of

25.3

60.6

330

Castletownbere

Ireland

51.65

-9.903

239

Malin Head

Ireland

55.367

-7.333

80

Hadera

Israel

32.467

34.883

340

Trieste

Italy

45.65

13.75

210

Port Royal, Kingston

Jamaica

17.933

-76.85

327

Abashiri

Japan

44.017

144.283

82

Aburatsu

Japan

31.35

131.25

103

Chichijima

Japan

27.083

142.183

88

Hakodate

Japan

41.47

140.43

326

Hamada

Japan

34.9

132.067

85

Kushimoto

Japan

33.49

135.46

89

Kushiro

Japan

42.58

144.22

86

Mera

Japan

34.55

139.49

104

Minami-Tori-Shima

Japan

24.18

153.58

83

Nagasaki

Japan

32.44

129.52

81

Naha

Japan

26.217

127.667

87

Ofunato

Japan

39.017

141.75

325

Toyama

Japan

36.46

137.14

324

Wakkanai

Japan

45.417

141.683

8

Mombasa

Kenya

-4.05

39.667

146

Christmas Island, Line Is.

Kiribati

1.983

-157.483

145

Kanton Island, Phoenix Is.

Kiribati

-2.49

-171.43

113

Tarawa, Gilbert Is. (Betio)

Kiribati

1.363

172.93

307

Won San

Korea, Democratic People's Republic Of

39.167

127.45

84

Pusan

Korea, Republic Of

35.1

129.033

271

Fort Dauphin (Taolanaro)

Madagascar

-25.017

47

15

Nosy-Be

Madagascar

-13.4

48.283

293

Chendering/Kuala Terengganu

Malaysia

5.267

103.183

43

Pengkalan TLDM Lumut

Malaysia

4.233

100.617

27

Gan

Maldives

-0.7

73.167

28

Male, Hulule

Maldives

4.167

73.5

111

Kwajalein

Marshall Islands

8.733

167.733

112

Majuro

Marshall Islands

7.1

171.367

105

Wake Island, Marshall Is.

Marshall Islands

19.283

166.617

338

Fort-de-France

Martinique

14.583

-61.05

18

Port Louis Harbour

Mauritius

-20.15

57.5

19

Rodrigues, Port Mathurin

Mauritius

-19.683

63.417

96

Dzaoudzi (Mayotte)

Mayotte

-12.783

45.25

267

Acapulco, Gro.

Mexico

16.833

-99.917

161

Cabo San Lucas

Mexico

22.883

-109.9

160

Isla Guadalupe

Mexico

28.883

-118.3

163

Manzanillo, Col.

Mexico

19.05

-104.333

213

Progreso, Yuc.

Mexico

21.3

-89.65

164

Puerto Angel

Mexico

15.65

-96.5

162

Socorro Is.

Mexico

18.733

-111.017

212

Veracruz, Ver.

Mexico

19.2

-96.133

116

Chuuk, Caroline Is.

Micronesia, Federated States Of

7.45

151.85

117

Kapingamarangi, Caroline Is.

Micronesia, Federated States Of

1.1

154.783

115

Pohnpei, Caroline Is.

Micronesia, Federated States Of

6.59

158.15

119

Yap, Caroline Is.

Micronesia, Federated States Of

9.517

138.133

282

Tan Tan

Morocco

28.5

-11.05

10

Inhambane

Mozambique

-23.917

35.5

11

Pemba

Mozambique

-12.967

40.483

37

Akyab (Sittwe)

Myanmar

20.15

92.9

141

Moulmein (Mawlamyine)

Myanmar

16.483

97.617

314

Walvis Bay

Namibia

-22.949

14.499

114

Nauru, Gilbert Is.

Nauru

-0.533

166.9

123

Noumea, New Caledonia

New Caledonia

-22.3

166.433

127

Auckland-Waitemata Hbr.

New Zealand

-36.51

174.46

129

Bluff

New Zealand

-46.6

168.35

128

Chatham Island

New Zealand

-43.95

-176.55

101

Wellington

New Zealand

-41.17

174.47

259

Lagos

Nigeria

6.421

3.407

124

Norfolk Island

Norfolk Island

-29.067

167.95

118

Saipan

Northern Mariana Islands

15.233

145.733

322

Andenes

Norway

69.19

16.09

234

Rorvik

Norway

64.867

11.25

321

Tregde

Norway

58

7.567

323

Vardo

Norway

70.333

31.1

4

Salalah

Oman

17

54

295

Gwadar

Pakistan

25.117

62.333

30

Karachi, Manoro Island

Pakistan

24.8

66.967

120

Malakal

Palau

7.333

134.467

168

Balboa

Panama

8.967

-79.6

208

Coco Solo

Panama

9.367

-79.883

63

Alotau

Papua New Guinea

-10.317

150.45

272

Daru

Papua New Guinea

-9.05

143.2

331

Lombrum (Manus)

Papua New Guinea

-2.033

147.367

65

Rabaul

Papua New Guinea

-4.2

152.183

173

Callao (La Punta)

Peru

-12.05

-77.15

71

Davao, Davao Gulf

Philippines

7.083

125.633

70

Jolo, Sulu

Philippines

6.067

121

72

Legaspi, Albay

Philippines

13.15

123.75

73

Manila, South Harbor

Philippines

14.583

120.967

246

Cascais

Portugal

38.417

-9.25

250

Funchal (Madeira)

Portugal

32.386

-16.547

245

Ponta Delgada (Azores)

Portugal

37.442

-25.403

244

Santa Cruz Del Flores (Azores)

Portugal

39.273

-31.075

206

San Juan

Puerto Rico

18.467

-66.117

312

Dikson

Russian Federation

73.367

80.65

97

Kaliningrad

Russian Federation

54.95

20.217

274

Murmansk

Russian Federation

68.967

33.05

92

Nagaevo By

Russian Federation

59.733

150.7

93

Petropavlovsk-Kamchatsky

Russian Federation

52.983

158.65

98

Port Tuapse, Black Sea

Russian Federation

44.1

39.067

309

Provideniya

Russian Federation

64.5

-173.183

99

Russkaia Gavan

Russian Federation

76.233

62.583

313

Tiksi (Tiksi Bukhta)

Russian Federation

71.667

128.75

90

Yuzhno Kurilsk

Russian Federation

44.017

145.867

17

Pointe Des Galets, Reunion Is.

Reunion

-20.933

55.3

266

Edinburgh, Tristan Da Cunha

Saint Helena, Ascension And Tristan Da Cunha

-37.05

-12.3

263

English Bay, Ascension Is.

Saint Helena, Ascension And Tristan Da Cunha

-7.917

-14.417

264

Jamestown, St Helena

Saint Helena, Ascension And Tristan Da Cunha

-15.967

-5.7

260

Sao Tome

Sao Tome And Principe

0.348

6.737

253

Dakar

Senegal

14.66

-17.44

339

Pointe La Rue

Seychelles

-4.672

55.527

44

Keppel Harbour

Singapore

1.467

103.833

66

Honiara

Solomon Islands

-9.433

159.95

6

Hafun (Dante)

Somalia

10.45

51.25

7

Mogadishu

Somalia

2.017

45.333

13

Durban

South Africa

-29.883

31.033

20

Marion Is.

South Africa

-46.867

37.867

76

Port Elizabeth

South Africa

-33.57

25.37

268

Simonstown

South Africa

-34.183

18.433

187

King Edward Point, South Georgia

South Georgia And The South Sandwich Islands

-54.25

-36.75

249

Ceuta (Spanish N. Africa)

Spain

35.54

-5.19

243

La Coruna

Spain

43.213

-8.232

251

Las Palmas, Canary Is.

Spain

28.133

-15.417

33

Colombo

Sri Lanka

6.933

79.85

231

Barentsburg (Sptizbergen)

Svalbard And Jan Mayen

78.067

14.25

345

Ny Alesund

Svalbard And Jan Mayen

78.933

11.95

233

Goteborg-Torshamnen

Sweden

57.41

11.48

341

Stockholm

Sweden

59.317

18.083

9

Mtwara

Tanzania, United Republic Of

-10.283

40.183

297

Zanzibar

Tanzania, United Republic Of

-6.15

39.183

39

Ko Lak

Thailand

11.783

99.817

42

Ko Taphao Noi

Thailand

7.833

98.433

125

Nuku’alofa

Tonga

-21.167

-175.25

203

Port of Spain

Trinidad And Tobago

10.65

-61.517

121

Funafuti, Ellice Is.

Tuvalu

-8.383

179.217

236

Lerwick

United Kingdom

60.15

-1.133

241

Newlyn

United Kingdom

50.1

-5.55

238

Stornoway

United Kingdom

58.2

-6.383

302

Adak, Aleutian Is.

United States

51.867

-176.633

220

Atlantic City, NJ

United States

39.35

-74.417

219

Duck, NC

United States

36.183

-75.75

289

Fort Pulaski, GA

United States

32.033

-80.9

107

French Frigate Shoals,

United States

23.867

-166.283

217

Galveston (Pier 21), TX

United States

29.317

-94.8

287

Hilo, Hawaiian Is.

United States

19.733

-155.067

108

Honolulu, Hawaiian Is.

United States

21.3

-157.867

216

Key West, FL

United States

24.55

-81.8

159

La Jolla (Scripps Pier), CA

United States

32.867

-117.267

290

Newport, RI

United States

41.5

-71.333

74

Nome

United States

64.5

-165.417

288

Pensacola, FL

United States

30.4

-87.217

151

Prudhoe Bay, AK

United States

70.4

-148.527

158

San Francisco, CA

United States

37.8

-122.467

100

Sand Point, AK

United States

55.333

-160.5

150

Seward, AK

United States

60.117

-149.433

154

Sitka, AK

United States

57.05

-135.333

157

South Beach, OR

United States

44.38

-124.03

102

Unalaska, Aleutian Is.

United States

53.883

-166.533

332

Virginia Keys

United States

25.732

-80.162

109

Johnston Is., Hawaiian Is.

United States Minor Outlying Islands

16.733

-169.533

106

Midway Island, Hawaiian Is.

United States Minor Outlying Islands

28.217

-177.367

300

Montevideo

Uruguay

-34.9

-56.25

348

Vanuatu

Vanuatu

-17.767

168.3

328

La Guaira

Venezuela, Bolivarian Republic Of

10.617

-66.933

75

Quinhon

Viet Nam

13.767

109.217

3

Aden

Yemen

12.783

44.983