Trends in upper‐level cloud cover and surface divergence over the tropical Indo‐Pacific Ocean between 1952 and 1997

Norris, Joel R.

doi:10.1029/2005jd006183

Cited by 41 publications

(49 citation statements)

References 56 publications

(95 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Laken et al (2012) indirectly came to a similar conclusion, while analysing the effect of solar activity on cloud altitudes with MODIS Terra and Aqua measurements. Norris (2005) comes to the same conclusion as well. The ENSO periodicity is still a matter of on-going research (Solomon and Newman, 2012) and is not the focus of this work.…”

Section: Trend Modelsupporting

confidence: 69%

“…Conversely, the warm pool situated in the western tropical Pacific (30 • N-30 • S and 100-160 • E) is characterized by the reverse situation: deep convective clouds occur during cold La Niña periods. Hence negative correlations between CF and SST are found (Norris, 2005;Marchand, 2013). This dipole-like ENSO influence on cloud properties can be seen in Fig.…”

Section: Cloud Property Changes Coupling To Ensomentioning

confidence: 63%

“…This is consistent with the picture of a reinforced meridional circulation which squeezes clouds at low altitudes, while high clouds spread out in the horizontal direction and air masses close the Hadley cell. In fact, positive correlations between CF, SST and surface convergence are found by Norris (2005) for the International Satellite Cloud Climatology Project (ISCCP) high cloud amount and the ground-based Extended Edited Cloud Report Archive (EECRA) high-cloud record, calculated over almost the same region. Conversely, the warm pool situated in the western tropical Pacific (30 • N-30 • S and 100-160 • E) is characterized by the reverse situation: deep convective clouds occur during cold La Niña periods.…”

Section: Cloud Property Changes Coupling To Ensomentioning

confidence: 91%

See 2 more Smart Citations

Linear trends in cloud top height from passive observations in the oxygen A-band

et al. 2014

View full text Add to dashboard Cite

Abstract. Measurements by the hyperspectral spectrometers GOME, SCIAMACHY and GOME-2 are used to determine the rate of linear change (and trends) in cloud top height (CTH) in the period between June 1996 and May 2012. The retrievals are obtained from Top-OfAtmosphere (TOA) backscattered solar light in the oxygen A-band using the Semi-Analytical CloUd Retrieval Algorithm SACURA. The physical framework relies on the asymptotic equations of radiative transfer, valid for optically thick clouds. Using linear least-squares techniques, a global trend of −1.78 ± 2.14 m yr −1 in deseasonalized CTH has been found, in the latitude belt within ±60 • , with diverging tendencies over land (+0.27 ± 3.2 m yr −1 ) and ocean (−2.51 ± 2.8 m yr −1 ). The El Niño-Southern Oscillation (ENSO), strongly coupled to CTH, forces clouds to lower altitudes. The global ENSO-corrected trend in CTH amounts to −0.49 ± 2.22 m yr −1 . At a global scale, no explicit regional pattern of statistically significant trends (at 95 % confidence level, estimated with bootstrap technique) have been found, which would be representative of typical natural synoptical features. One exception is North Africa, which exhibits the strongest upward trend in CTH sustained by an increasing trend in water vapour.

show abstract

Section: Trend Modelsupporting

confidence: 69%

Section: Cloud Property Changes Coupling To Ensomentioning

confidence: 63%

Section: Cloud Property Changes Coupling To Ensomentioning

confidence: 91%

See 1 more Smart Citation

Linear trends in cloud top height from passive observations in the oxygen A-band

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Deser & Phillips (2006) concluded that there was no significant increase in precipitation over the Indian Ocean, based on analysis of the cloud amount and wind convergence over the ocean. Norris (2005) suggested a negative trend in upper level cloud cover in the equatorial Indian Ocean between 1952 and 1997. Further study based on observation is needed to clarify the long-term trend of precipitation in the Indian Ocean.…”

Section: Discussionmentioning

confidence: 99%

Impact of Solar Radiation Data and Its Absorption Schemes on Ocean Model Simulations

Yamanaka¹,

Ishizaki²,

Tsujino³

et al. 2012

Solar Radiation

View full text Add to dashboard Cite

“…Cess and Udelhofen 2003;Norris 2005) analysed trends based on cloud fraction information derived from visible and infrared wavelengths using the International Satellite Cloud Climatology Project database (Rossow and Schiffer 1999, and references therein) and the Extended Edited Cloud Report Archive surface observations database (Hahn and Warren 1999). There exist different ways to evaluate the radiation budget and its variability, yet an accurate evaluation requires high quality ground-based observations.…”

Section: Introductionmentioning

confidence: 99%

Annual anomalies and trends for TOMS reflectivities (1978–2005) in the Southern Hemisphere

Yuchechen

Lakkis

Canziani

2017

International Journal of Remote Sensing

View full text Add to dashboard Cite

Annual anomalies of Lambertian equivalent reflectivity (LER) retrieved from the total ozone mapping spectrometer spanning the period November 1978-November 2005 were studied in the Southern Hemisphere, in a region bounded by 0°S and 60°S, and their trends were estimated. With the exception of few regions where the variable may represent the contribution of both cloudiness and snow, trends in LER anomalies provided an evolution of total cloudiness. On average, the study region experienced a net increase in LER values of 0.78 reflectivity units (RU) decade , was located over the eastern Pacific, off the coasts of Chile and Peru, where the presence of marine stratocumulus is frequent. Despite the overall positive trend there were regions that yielded a negative one, most notably the tropical latitudes of South America and Africa. The yearly zonal means also showed a positive trend at all latitudes, but significance occurred beyond 20°S only. Correlation maps between LER anomalies and five different circulation indices were also introduced. The indices with the highest and lowest number of significant correlation values were the Madden-Julian oscillation at 70°E and the quasi-biennial Oscillation, respectively. ARTICLE HISTORY

show abstract

Trends in upper‐level cloud cover and surface divergence over the tropical Indo‐Pacific Ocean between 1952 and 1997

Cited by 41 publications

References 56 publications

Linear trends in cloud top height from passive observations in the oxygen A-band

Linear trends in cloud top height from passive observations in the oxygen A-band

Impact of Solar Radiation Data and Its Absorption Schemes on Ocean Model Simulations

Annual anomalies and trends for TOMS reflectivities (1978–2005) in the Southern Hemisphere

Contact Info

Product

Resources

About