Numerical simulations of homogeneously nucleated natural cirrus and contrail-cirrus. Part 1: How different are they?

Unterstrasser, Simon; Gierens, Klaus; Sölch, Ingo; Lainer, Martin Lorenz Maximilian (2017). Numerical simulations of homogeneously nucleated natural cirrus and contrail-cirrus. Part 1: How different are they? Meteorologische Zeitschrift, 26(6), pp. 621-642. Borntraeger 10.1127/metz/2016/0777

[img]
Preview
Text
metz_Vol_26_No_6_p621-642_Numerical_simulations_of_homogeneously_nucleated_natural_cirrus_and_contrail_cirrus_Part_1_How_different_are_they_8703.pdf - Published Version
Available under License Creative Commons: Attribution-Noncommercial (CC-BY-NC).

Download (5MB) | Preview

The evolution of contrail-cirrus and natural cirrus formed by homogeneous nucleation is studied over up to ten hours by means of a Large-Eddy Simulation (LES) model equipped with a Lagrangian ice microphysics module. This is the first time that both cloud types are investigated in a single study. Characteristics of their life cycles depend strongly on the synoptic scenario. Weak, but enduring updraughts allow for the longest life times of contrail-cirrus. For cirrus clouds, the updraught speed during their formation is most crucial. Once contrails lose their linear shape they are hardly distinguishable from natural cirrus which makes it difficult to evaluate the extent and effect of the anthropogenic cloud modification. Despite their different formation mechanisms (contrails are generated locally and have initially much higher ice crystal number concentrations than natural cirrus) we could not single out microphysical criteria that could help to distinguish in general between both cloud types in observations.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Microwaves

UniBE Contributor:

Lainer, Martin Lorenz Maximilian

Subjects:

600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

0941-2948

Publisher:

Borntraeger

Language:

English

Submitter:

Franziska Stämpfli

Date Deposited:

15 Jun 2018 10:26

Last Modified:

15 Jun 2018 10:26

Publisher DOI:

10.1127/metz/2016/0777

BORIS DOI:

10.7892/boris.114737

URI:

https://boris.unibe.ch/id/eprint/114737

Actions (login required)

Edit item Edit item
Provide Feedback