Heterogeneous Ice Nucleation in the Tropical Tropopause Layer

Jensen, Eric J.; Kärcher, Bernd; Ueyama, Rei; Pfister, Leonhard; Bui, Theopaul V.; Diskin, Glenn S.; DiGangi, Joshua P.; Woods, Sarah; Lawson, R. Paul; Froyd, Karl D.; Murphy, Daniel M.

doi:10.1029/2018jd028949

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Heterogeneous Ice Nucleation in the Tropical Tropopause Layer

2018
By Jensen, Eric J. ; Kärcher, Bernd ; Ueyama, Rei ; ...
Source: Journal of Geophysical Research-Atmospheres, 123(21), 12210-12227.

[PDF-1.92 MB]

Details Related Documents You May Also Like

Details:

Journal Title:

Journal of Geophysical Research: Atmospheres
Personal Author:

Jensen, Eric J. ; Kärcher, Bernd ; Ueyama, Rei ; Pfister, Leonhard ; Bui, Theopaul V. ; ... More +

Jensen, Eric J. ; Kärcher, Bernd ; Ueyama, Rei ; Pfister, Leonhard ; Bui, Theopaul V. ; Diskin, Glenn S. ; DiGangi, Joshua P. ; Woods, Sarah ; Lawson, R. Paul ; Froyd, Karl D. ; Murphy, Daniel M. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory) Less -
Description:

Recent laboratory experiments have advanced our understanding of heterogeneous ice nucleation at low temperatures. We use these laboratory results, along with field measurements of aerosol composition, to constrain a parameterization of heterogeneous nucleation rate dependence on temperature and supersaturation. We apply this nucleation parameterization in detailed simulations of transport and cloud formation in the Tropical Tropopause Layer (TTL,similar or equal to 14-18 km) constrained by high-altitude aircraft measurements of TTL cirrus microphysical properties and supersaturation. The model results indicate that if the abundant TTL organic-containing aerosols were effective glassy ice nuclei (IN), as indicated by laboratory experiments with simple sugars/acids, then heterogeneous nucleation would prevent the occurrences of large ice concentrations and large ice supersaturations, both of which are clearly indicated by the in situ observations. If glassy organic aerosols are relatively poor IN, as indicated by laboratory experiments with more atmospherically relevant secondary organic aerosol-like composition, then the simulated ice concentrations and supersaturations are in reasonable agreement with the observations. Concentrations of effective mineral dust or ammonium sulfate IN larger than about 50/L can drive significant changes in cirrus microphysical properties and occurrence frequency. The cloud occurrence frequency can either increase or decrease, depending on the efficacy and abundance of IN added to the TTL. Relatively low TTL concentrations of mineral dust particles (<= 10 L-1 indicated by the limited available field measurements) have negligible impact on cirrus frequencies or microphysical properties. Given the assortment of uncertainties, meaningful estimates of TTL aerosol-cirrus indirect effects on radiative forcing are likely not possible at this time.
Source:

Journal of Geophysical Research-Atmospheres, 123(21), 12210-12227.
DOI:

https://doi.org/10.1029/2018jd028949
Document Type:

Journal Article
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:86071606cc5d641b88740c32ec347bec49de94dd798ee4864f393877a5dba4fa
Download URL:

https://repository.library.noaa.gov/view/noaa/22208/noaa_22208_DS1.pdf
File Type:

No Additional Files

More +

Heterogeneous Ice Nucleation in the Tropical Tropopause Layer

Details:

Supporting Files

Related Documents

You May Also Like