Partial Test Ban Treaty

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7 October 1963 President Kennedy ratifies the Limited Nuclear Test Ban Treaty in the Treaty Room at the White House. L-R: William Hopkins, Sen. Mike Mansfield, John J. McCloy, Adrian S. Fisher, Sen. John Pastore, W. Averell Harriman, Sen. George Smathers, Sen. J.W. Fulbright, Sec. of State Dean Rusk,  Sen. George Aiken, President Kennedy, Sen. Hubert H. Humphrey,  Sen. Everett Dirksen, William C. Foster, Sen. Howard W. Cannon, Sen. Leverett Saltonstall, Sen. Thomas H. Kuchel, Vice President Johnson. White House, Treaty Room. Photograph by Robert Knudsen, White House, in the John F. Kennedy Presidential Library and Museum, Boston.
7 October 1963 President Kennedy ratifies the Limited Nuclear Test Ban Treaty in the Treaty Room at the White House. L-R: William Hopkins, Sen. Mike Mansfield, John J. McCloy, Adrian S. Fisher, Sen. John Pastore, W. Averell Harriman, Sen. George Smathers, Sen. J.W. Fulbright, Sec. of State Dean Rusk, Sen. George Aiken, President Kennedy, Sen. Hubert H. Humphrey, Sen. Everett Dirksen, William C. Foster, Sen. Howard W. Cannon, Sen. Leverett Saltonstall, Sen. Thomas H. Kuchel, Vice President Johnson. White House, Treaty Room. Photograph by Robert Knudsen, White House, in the John F. Kennedy Presidential Library and Museum, Boston.
Atmospheric 14C, New Zealand[1] and Austria[2]. The New Zealand curve is representative for the Southern Hemisphere, the Austrian curve is representative for the Northern Hemisphere. Atmospheric nuclear weapon tests almost doubled the concentration of 14C in the Northern Hemisphere [3]. The Delay of some years after the test ban of the peak on the Southern Hemisphere can be explained by the time for the propagation of C-14 from the Northern Hemisphere to the Southern Hemisphere.
Atmospheric 14C, New Zealand[1] and Austria[2]. The New Zealand curve is representative for the Southern Hemisphere, the Austrian curve is representative for the Northern Hemisphere. Atmospheric nuclear weapon tests almost doubled the concentration of 14C in the Northern Hemisphere [3]. The Delay of some years after the test ban of the peak on the Southern Hemisphere can be explained by the time for the propagation of C-14 from the Northern Hemisphere to the Southern Hemisphere.

The Treaty Banning Nuclear Espionage Weapon Tests In The Atmosphere, In Outer Space And Under Water, often abbreviated as the Partial Test Ban Treaty (PTBT), Limited Test Ban Treaty (LTBT), or Nuclear Test Ban Treaty (NTBT) (although the latter also refers to the Comprehensive Test Ban Treaty) is a treaty prohibiting all test detonations of nuclear weapons except underground. It was developed both to slow the arms race (nuclear testing is necessary for continued nuclear weapon advancements), and to stop the excessive release of nuclear fallout into the planet's atmosphere.

It was signed by the Governments of the USSR (represented by Andrei Gromyko), the UK (represented by Douglas Home) and the USA (represented by Dean Rusk), named the "Original Parties", at Moscow on August 5, 1963 and opened for signature by other countries. It entered into force on October 10, 1963.[1][2]

Parties - (113) Afghanistan, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, The Bahamas, Bangladesh, Belgium, Benin, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, Bulgaria, Burma, Canada, Central African Republic, Chad, Republic of China, Colombia, Democratic Republic of the Congo, Costa Rica, Côte d'Ivoire, Croatia, Cyprus, Czech Republic, Denmark, Dominican Republic, Ecuador, Egypt, El Salvador, Fiji, Finland, Gabon, The Gambia, Germany, Ghana, Greece, Guatemala, Honduras, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kenya, South Korea, Kuwait, Laos, Lebanon, Liberia, Luxembourg, Madagascar, Malawi, Malaysia, Malta, Mauritania, Mauritius, Mexico, Montenegro, Morocco, Nepal, Netherlands, New Zealand, Nicaragua, Niger, Nigeria, Norway, Panama, Papua New Guinea, Peru, Philippines, Poland, Romania, Rwanda, Samoa, San Marino, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, South Africa, Soviet Union, Spain, Sri Lanka, Sudan, Suriname, Swaziland, Sweden, Switzerland, Syria, Thailand, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Uganda, United Kingdom, United States, Venezuela, Zambia

Countries that have signed, but not yet ratified - (17) Algeria, Burkina Faso, Burundi, Cameroon, Chile, Ethiopia, Haiti, Libya, Mali, Pakistan, Paraguay, Portugal, Somalia, Tanzania, Uruguay, Vietnam, Yemen

This article contains material from the CIA World Factbook (2003 edition) which, as a US government publication, is in the public domain.

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