Diane Farrar
August 13, 1997
NASA Ames Research Center, Moffett Field, CA
650/604-3934 or 604-9000 	dfarrar@mail.arc.nasa.gov

RELEASE:  97-61AR

JUPITER'S HURRICANE-FORCE WINDS INCREASE IN DEPTHS OF THE PLANET'S ATMOSPHERE, NASA REVEALS

The Galileo Probe craft made history's first entry into Jupiter's atmosphere in December 1995 and penetrated into what appears to be the region of Jupiter's large-scale interior circulation. The wind speed findings, just completed after detailed analysis, indicate that Jupiter's whole atmosphere circulates, perhaps down to its liquid metallic hydrogen core.

"The winds below Jupiter's cloud tops do not die off as they would if driven by solar heating, but persist and increase to gale force at depths extending 100 miles below the clouds," said Al Seiff, probe investigator at NASA Ames Research Center, Moffett Field, CA. Seiff was principal investigator on the probe's atmosphere structure experiment during the most difficult atmospheric entry in the solar system. (Jupiter contains 71 percent of all the planetary mass in the solar system. The planet's massive gravity produced intense heating by atmospheric friction--with temperatures hotter than the surface of the sun--during the probe's descent.)

"We have dipped into the planet's internal motions and have the first clue about the circulation of gases in the deep interior," he said.

Probe instruments made two independent measurements of the winds. Principal investigator David Atkinson, Uni com.apple.print.PageFormat.PMHorizontalRes 72 com.apple.print.ticket.stateFlag 0 com.apple.print.PageFormat.PMOrientation com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PageFormat.PMOrientation 1 com.apple.print.ticket.stateFlag 0 com.apple.print.PageFormat.PMScaling com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PageFormat.PMScaling 1 com.apple.print.ticket.stateFlag 0 com.apple.print.PageFormat.PMVerticalRes com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PageFormat.PMVerticalRes 72 com.apple.print.ticket.stateFlag 0 com.apple.print.PageFormat.PMVerticalScaling com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PageFormat.PMVerticalScaling 1 com.apple.print.ticket.stateFlag 0 com.apple.print.subTicket.paper_info_ticket PMPPDPaperCodeName com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray PMPPDPaperCodeName Letter com.apple.print.ticket.stateFlag 0 PMTiogaPaperName com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray PMTiogaPaperName na-letter com.apple.print.ticket.stateFlag 0 com.apple.print.PageFormat.PMAdjustedPageRect com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PageFormat.PMAdjustedPageRect 0.0 0.0 734 576 com.apple.print.ticket.stateFlag 0 com.apple.print.PageFormat.PMAdjustedPaperRect com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PageFormat.PMAdjustedPaperRect -18 -18 774 594 com.apple.print.ticket.stateFlag 0 com.apple.print.PaperInfo.PMPaperName com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PaperInfo.PMPaperName na-letter com.apple.print.ticket.stateFlag 0 com.apple.print.PaperInfo.PMUnadjustedPageRect com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PaperInfo.PMUnadjustedPageRect 0.0 0.0 734 576 com.apple.print.ticket.stateFlag 0 com.apple.print.PaperInfo.PMUnadjustedPaperRect com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PaperInfo.PMUnadjustedPaperRect -18 -18 774 594 com.apple.print.ticket.stateFlag 0 com.apple.print.PaperInfo.ppd.PMPaperName com.apple.print.ticket.creator com.apple.jobticket com.apple.print.ticket.itemArray com.apple.print.PaperInfo.ppd.PMPaperName US Letter com.apple.print.ticket.stateFlag 0 com.apple.print.ticket.APIVersion 00.20 com.apple.print.ticket.type com.apple.print.PaperInfoTicket com.apple.print.ticket.APIVersion 00.20 com.apple.print.ticket.type com.apple.print.PageFormatTicket 8BIMíH

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