Total ozone trends deduced from Nimbus 7 TOMS data

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/91GL01302· OSTI ID:5406518

Stolarski, R S; McPeters, R D; Herman, J R ^[1]; Bloomfield, P ^[2]

---

1. NASA Goddard Space Flight Center, Greenbelt, MD (United States)
2. North Carolina State Univ., Raleigh (United States)

The Total Ozone Mapping Spectrometer (TOMS) on the Nimbus 7 satellite has been measuring the total column amount of ozone over the globe for more than 11 years. Recent improvements in the data analysis have led to a technique for determining and removing drift in the calibration such that the data at the end of the record are precise to {plus minus} 1.3% (2{sigma}) relative to the data at the beginning of the record. A statistical model, including terms for seasonal variation, linear trend, quasi-biennial oscillation, solar cycle and second-order autoregressive noise has been fit to the TOMS time series of total ozone data. The linear trend obtained when this statistical model is fit to the TOMS data averaged between 65N and 65S latitudes is {minus}0.26 {plus minus} 0.14%/year or {minus}3% over the 11.6 year time period from November, 1978 through May, 1990. The trend is near zero (0.0002 {plus minus} 0.2%/year) at the equator and increases towards both poles. At 50N the annually averaged trend is {minus}0.5 {plus minus} .21%/year. The 50N trend over the 11.6 year time period shows a strong seasonal variation from more than {minus}0.8%/year in winter and early spring (February and March) to about {minus}0.2%/year in summer (July and August).

• OSTI ID: 5406518
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Vol. 18:6; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
OZONE
ECOLOGICAL CONCENTRATION
ATMOSPHERIC CHEMISTRY
CALIBRATION
CLIMATE MODELS
DATA ANALYSIS
GLOBAL ASPECTS
OPTIMIZATION
OZONE LAYER
SATELLITES
SEASONAL VARIATIONS
STATISTICAL MODELS
STRATOSPHERE
CHEMISTRY
EARTH ATMOSPHERE
LAYERS
MATHEMATICAL MODELS
VARIATIONS
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)