Abstract
We report a statistical regression model analysis of long‐term linear trends in the ozonesonde vertical profiles in the troposphere for the period 1972–2001 from the three tropical stations in tropical India. An analysis of tropospheric column ozone (TCO) data derived from ozonesonde and Nimbus7/Earth Probe ‐total ozone mapping spectrometer (TOMS) during the period 1979–2002 has also been done. There are no statistically significant trends over Trivandrum (8.3°N, 76.6°E, 61 m) but significant positive trend (within 2‐sigma error) are found to occur in the lower troposphere over Pune (18.3°N, 73.5°E, 559 m) and throughout the entire troposphere over a heavily air‐polluted urban center Delhi (28.4°N, 77.1°E, 216 m). However, over the last decade, variations in tropospheric ozone have become statistically insignificant even over Delhi in spite of increasing surface NOx concentrations. The TCO obtained by ozonesonde as well as TOMS satellite data over Trivandrum do not reveal any statistically significant trend.
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.
