i
Heterogeneous Ice Nucleation in the Tropical Tropopause Layer
-
2018
Source: Journal of Geophysical Research-Atmospheres, 123(21), 12210-12227.
Details:
-
Journal Title:Journal of Geophysical Research: Atmospheres
-
Personal Author:
-
NOAA Program & Office:
-
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.
-
Document Type:
-
Rights Information:Other
-
Compliance:Submitted
-
Main Document Checksum:urn:sha256:86071606cc5d641b88740c32ec347bec49de94dd798ee4864f393877a5dba4fa
-
File Type:
Supporting Files
-
No Additional Files
More +
Related Documents
-
Personal Author:Tulich, S. N.2015 | Journal of Advances in Modeling Earth Systems, 7(2), 938-962.Description:This paper describes a general method for the treatment of convective momentum transport (CMT) in large-scale dynamical solvers that use a cyclic, two...2018 | Journal of Geophysical Research-Atmospheres, 123(21), 12368-12393.Description:We examine the distribution and fate of nitrogen oxides (NOx) in the lower troposphere over the Northeast United States (NE US) using aircraft observa...2017 | Atmospheric Chemistry and Physics, 17(2), 1161-1186.Description:We report measurements of CH4 (measured in situ by the Harvard University Picarro Cavity Ringdown Spectrometer (HUPCRS) and NOAA Unmanned Aircraft Sys...2017 | Atmospheric Measurement Techniques, 10(8), 2941-2968.Description:VOCs related to oil and gas extraction operations in the United States were measured by H3O+ chemical ionization time-of-flight mass spectrometry (H3O...2017 | Atmospheric Chemistry and Physics, 17(8), 5331-5354.Description:Ambient pine forest air was oxidized by OH, O-3, or NO3 radicals using an oxidation flow reactor (OFR) during the BEACHON-RoMBAS (Bio-hydro-atmosphere...2017 | Journal of Advances in Modeling Earth Systems, 9(1), 627-646.Description:Low and high clouds of shallow extent, especially stratocumulus and even more so for high-level cirrus clouds that reside where vertical resolution is...2017 | Atmospheric Measurement Techniques, 10(5), 1911-1926.Description:The sum of all reactive nitrogen species (NOy) includes NOx (NO2 + NO) and all of its oxidized forms, and the accurate detection of NOy is critical to...Personal Author:Vander Woude, Andrea ;Ruberg, Steve...2019 | Journal of Great Lakes Research, 45(3), 536-546.Description:NOAA GLERL has routinely flown a hyperspectral imager to detect cyanobacteria harmful algal blooms (cyanoHABs) over the Great Lakes since 2015. Three ...Personal Author:Churnside, James ;Marchbanks, Richard...2017 | Remote Sensing, 9(4), 12.Description:The optical backscattering from particles in the ocean is an important quantity that has been measured by remote sensing techniques and in situ instru...2017 | Journal of Geophysical Research-Atmospheres, 122(7), 3944-3952.Description:In the current study, the electromagnetic properties of porous aerosol particles are calculated in two ways. In the first, a porous target input file ...Personal Author:Butler, A H ;Daniel, J S...2016 | Environmental Research Letters, 11(6), 064017.Description:Due to the success of the Montreal Protocol in limiting emissions of ozone-depleting substances, concentrations of atmospheric carbon dioxide, nitrous...2017 | Atmospheric Chemistry and Physics, 17(11), 7193-7212.Description:Measurements of primary biological aerosol particles (PBAP), especially at altitudes relevant to cloud formation, are scarce. Single-particle mass spe...Personal Author:Zaragoza, Jake ;Callahan, Sara...2017 | Journal of Geophysical Research-Atmospheres, 122(22), 12416-12432.Description:We report on measurements of acyl peroxy nitrates (APNs) obtained from two ground sites and the NSF/National Center for Atmospheric Research C-130 air...2017 | Journal of Geophysical Research-Atmospheres, 122(2), 1261-1280.Description:Much attention has been focused on the transport of ozone (O-3) to the western U.S., particularly given the latest revision of the National Ambient Ai...Personal Author:Kim, Jinwoong ;Kim, Hyun Mee...2017 | Atmospheric Chemistry and Physics, 17(4), 2881-2899.Description:To investigate the effect of additional CO2 observations in the Siberia region on the Asian and global surface CO2 flux analyses, two experiments usin...2017 | Atmospheric Measurement Techniques, 10(10), 3833-3850.Description:At local scales, emissions of methane and carbon dioxide are highly uncertain. Localized sources of both trace gases can create strong local gradients...Gradients of column CO2 across North America from the NOAA Global Greenhouse Gas Reference NetworkCite2017 | Atmospheric Chemistry and Physics, 17(24), 15151-15165.Description:This study analyzes seasonal and spatial patterns of column carbon dioxide (CO2) over North America, calculated from aircraft and tall tower measureme...2017 | Atmospheric Measurement Techniques, 10(12), 4805-4818.Description:A new photometer is described for continuous determination of the aerosol light absorption coefficient, optimized for long-term studies of the climate...Personal Author:Lonsdale, Chantelle R. ;Hegarty, Jennifer D....2017 | Atmospheric Chemistry and Physics, 17(4), 2721-2739.Description:NH3 retrievals from the NASA Tropospheric Emission Spectrometer (TES), as well as surface and aircraft observations of NH3(g) and submicron NH4(p), ar...Personal Author:Wood, Eric F. ;Schubert, Siegfried D....2015 | Journal of Hydrometeorology, 16(4), 1636-1657.Description:This paper summarizes and synthesizes the research carried out under the NOAA Drought Task Force (DTF) and submitted in this special collection. The D...
More +
You May Also Like
Personal Author:
Jensen, Eric J. ;
Ueyama, Rei
...
2016 | Journal of the Atmospheric Sciences, 73(6), 2445-2464.
Description:
Numerical simulations of cirrus formation in the tropical tropopause layer (TTL) during boreal wintertime are used to evaluate the impact of heterogen...