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First airborne water vapor lidar measurements in the tropical upper troposphere and mid-latitudes lower stratosphere: accuracy evaluation and intercomparisons with other instruments
airborne water vapor lidar troposphere mid-latitudes lower stratosphere intercomparisons
2008/11/19
In the tropics, deep convection is the major source of uncertainty in water vapor transport to the upper troposphere and into the stratosphere. Although accurate measurements in this region would be o...
Vertical profile of peroxyacetyl nitrate (PAN) from MIPAS-STR measurements over Brazil in February 2005 and its contribution to tropical UT NOy partitioning
peroxyacetyl nitrate MIPAS-STR Brazil tropical UT NOy
2008/11/17
We report on the retrieval of PAN (CH3C(O)OONO2) in the upper tropical troposphere from limb measurements by the remote-sensor MIPAS-STR on board the Russian high altitude research aircraft M55-Geophy...
Corrigendum to “The tropical forest and fire emissions experiment: laboratory fire measurements and synthesis of campaign data”
tropical forest fire emissions laboratory fire measurements
2008/11/14
Corrigendum to "The tropical forest and fire emissions experiment: laboratory fire measurements and synthesis of campaign data" published in Atmos. Chem. Phys., 8, 3509–3527, 2008.
Correlation between equatorial Kelvin waves and the occurrence of extremely thin ice clouds at the tropical tropopause
equatorial Kelvin waves extremely thin ice clouds tropical tropopause
2008/11/13
A number of field-campaigns in the tropics have been conducted in recent years with two different LIDAR systems at Paramaribo (5.8° N, 55.2° W), Suriname. The lidars detect particles in the atmosphere...
The Quasi-biennial Oscillation and annual variations in tropical ozone from SHADOZ and HALOE
tropical ozone SHADOZ HALOE
2008/11/13
We examine the tropical ozone mixing ratio perturbation fields generated from a monthly ozone climatology using 1998 to 2006 ozonesonde data from the Southern Hemisphere Additional Ozonesondes (SHADOZ...
Characteristics of aerosol and cloud particle size distributions in the tropical tropopause layer measured with optical particle counter and lidar
cloud particle tropical tropopause layer optical particle
2008/11/12
An optical particle counter (OPC) is used in conjunction with lidar measurements to examine the characteristics of the particle size distribution in cirrus cloud in the tropical tropopause layer (TTL)...
Evaluation of ECMWF ERA-40 temperature and wind in the lower tropical stratosphere since 1988 from past long-duration balloon measurements
ECMWF ERA-40 lower tropical stratosphere
2008/11/12
The temperature and wind of the ECMWF ERA-40 reanalysis in the tropical lower stratosphere during the period 1988–2001 has been evaluated by comparison with independent in situ measurements of 21 IR M...
Halogenated organic species over the tropical South American rainforest
halogenated organic specie tropical South American rainforest
2008/11/11
Airborne measurements of the halogenated trace gases methyl chloride, methyl bromide and chloroform were conducted over the Atlantic Ocean and about 1000 km of pristine tropical rainforest in Suriname...
Tropical cooling and the onset of North American glaciation
tropical North American glaciation
2008/11/5
We offer a test of the idea that gradual cooling in the eastern tropical Pacific led to cooling of North America and the initiation of glaciation ~3 Myr ago. Using modern climate data we estimate how...
Comparison between early Odin-SMR, Aura MLS and CloudSat retrievals of cloud ice mass in the upper tropical troposphere
early Odin-SMR Aura MLS cloud ice massupper tropical troposphere
2008/11/4
Emerging microwave satellite techniques are expected to provide improved global measurements of cloud ice mass. CloudSat, Aura MLS and Odin-SMR fall into this category and early cloud ice retrievals f...
Formation of large (≃100 μm) ice crystals near the tropical tropopause
formation ice crystals tropical tropopause
2008/11/3
Recent high-altitude aircraft measurements with in situ imaging instruments indicated the presence of relatively large (≃100 μm length), thin (aspect ratios of ≃6:1 or larger) hexagonal pl...
Aircraft measurements of microphysical properties of subvisible cirrus in the tropical tropopause layer
aircraft measurements microphysical properties subvisible cirrus tropical tropopause layer
2008/11/3
Subvisible cirrus (SVC) clouds are often observed within the tropical tropopause layer (TTL). Some studies suggest that SVC has a significant impact on the earth radiation budget. The Costa Rica Aura ...
Tropical thin cirrus and relative humidity observed by the Atmospheric Infrared Sounder
tropical thin cirrus relative humidity atmospheri infrared sounder
2008/11/3
Global observations of cloud and humidity distributions in the upper troposphere within all geophysical conditions are critically important in order to monitor the present climate and to provide neces...
Long-term climatology of air mass transport through the Tropical Tropopause Layer (TTL) during NH winter
Long-term climatology mass transport Tropical Tropopause Layer (TTL) NH winter
2008/10/30
A long-term climatology of air mass transport through the tropical tropopause layer (TTL) is presented, covering the period from 1962–2005. The transport through the TTL is calculated with a Lagrangi...
Turbulent vertical diffusivity in the sub-tropical stratosphere
Turbulent vertical diffusivity sub-tropical stratosphere
2008/10/29
Vertical (cross-isentropic) mixing is produced by small-scale turbulent processes which are still poorly understood and paramaterized in numerical models. In this work we provide estimates of local eq...