Abstract
Global variations in stratospheric ozone and lower stratospheric temperature are documented for the period 1991–1994, following the eruption of Mount Pinatubo in June 1991. Column ozone measurements are from the total ozone mapping spectrometer instruments on the Nimbus 7 and Meteor 3 satellites, together with solar backscattered ultraviolet data from NOAA 11; these satellite ozone data are validated by comparisons with ground‐based Dobson spectrophotometer measurements. Ozone profile data from the halogen occultation experiment and microwave limb sounder instruments on the upper atmosphere research satellite are also analyzed. Satellite temperature data are from the microwave sounding unit channel 4, representing a mean of the 150‐ to 50‐mbar layer. The ozone observations show substantial decreases in column ozone (of order 5–10%) over large regions of the globe; largest losses are observed in northern hemisphere middle‐high latitudes during winter‐spring of each year (largest in 1992–1993), over southern hemisphere high latitudes in spring 1993, and episodically over the tropics during 1991–1993. Temperatures are anomalously warm (by order 1 K) over 30°N‐S for 1 to 2 years following the eruption. Significant cold anomalies are also observed over the northern hemisphere polar cap during summer 1993, a result probably related to the decreased ozone levels throughout 1993.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
