Year

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

Global average of air relative humidity, % [27]

79.277

79.420

79.622

79.181

79.502

79.403

78.719

78.738

79.009

79.027

79.094

79.155

79.172

79.178

Global average of air mean temperature [28]

20.471

20.132

19.119

19.166

18.983

18.853

18.921

18.996

18.952

19.029

18.887

18.723

19.003

18.903

air density, Kg/m³

1.202

1.204

1.208

1.208

1.208

1.209

1.209

1.208

1.208

1.208

1.209

1.209

1.208

1.209

Air absolute humidity, g/Kg

0.117

0.115

0.108

0.108

0.107

0.106

0.106

0.106

0.106

0.107

0.106

0.105

0.107

0.106

Dry air specific heat capacity, KJ/(Kg*K) [34]

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

Water vapor specific heat capacity, KJ/(Kg*K)

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

Surface air specific heat capacity, KJ/(Kg*K)

1.224

1.220

1.208

1.207

1.206

1.204

1.203

1.204

1.204

1.205

1.203

1.201

1.205

1.204

Year

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

Global average of air relative humidity, % [27]

79.207

79.251

79.440

78.942

78.862

78.940

79.093

78.714

79.185

79.249

79.022

79.023

78.946

78.978

Global average of air mean temperature [28]

18.929

19.005

18.928

19.143

19.315

19.033

19.009

19.317

19.083

18.689

18.944

19.407

19.109

19.162

air density, Kg/m³

1.209

1.208

1.209

1.208

1.207

1.208

1.208

1.207

1.208

1.210

1.208

1.207

1.208

1.208

Air absolute humidity, g/Kg

0.106

0.107

0.107

0.107

0.108

0.107

0.107

0.108

0.107

0.105

0.106

0.109

0.107

0.108

Dry air specific heat capacity, KJ/(Kg*K) [34]

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

Water vapor specific heat capacity, KJ/(Kg*K)

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

Surface air specific heat capacity, KJ/(Kg*K)

1.204

1.205

1.205

1.206

1.208

1.205

1.205

1.208

1.206

1.201

1.204

1.210

1.206

1.206

Year

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

Global average of air relative humidity, % [27]

79.022

79.092

79.143

79.323

79.170

79.326

79.369

79.413

78.895

78.837

78.908

78.787

79.032

79.018

Global average of air mean temperature [28]

19.077

19.222

19.107

18.803

19.247

19.553

18.760

18.649

18.611

18.722

18.834

18.665

18.737

19.034

air density, Kg/m³

1.208

1.207

1.208

1.209

1.207

1.206

1.209

1.210

1.210

1.209

1.209

1.210

1.209

1.208

Air absolute humidity, g/Kg

0.107

0.108

0.107

0.106

0.108

0.111

0.105

0.105

0.104

0.104

0.105

0.104

0.105

0.107

Dry air specific heat capacity, KJ/(Kg*K) [34]

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

Water vapor specific heat capacity, KJ/(Kg*K)

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

Surface air specific heat capacity, KJ/(Kg*K)

1.205

1.207

1.206

1.203

1.208

1.212

1.202

1.201

1.199

1.201

1.202

1.200

1.201

1.205

Year

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

Global average of air relative humidity, % [27]

78.947

78.859

78.775

79.136

78.915

79.030

78.696

78.487

78.608

78.716

78.671

78.896

78.565

79.003

Global average of air mean temperature [28]

18.756

18.708

18.854

18.664

18.706

18.955

18.616

19.142

19.554

19.494

19.219

19.102

19.286

19.433

air density, Kg/m³

1.209

1.209

1.209

1.210

1.209

1.208

1.210

1.208

1.206

1.206

1.207

1.208

1.207

1.206

Air absolute humidity, g/Kg

0.105

0.104

0.105

0.104

0.104

0.106

0.104

0.107

0.110

0.109

0.108

0.107

0.108

0.109

Dry air specific heat capacity, KJ/(Kg*K) [34]

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

1.006

Water vapor specific heat capacity, KJ/(Kg*K)

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

1.863

Surface air specific heat capacity, KJ/(Kg*K)

1.201

1.201

1.202

1.201

1.201

1.204

1.199

1.205

1.210

1.210

1.206

1.205

1.207

1.210