Next Article in Journal
Origin of the Fine Scale Tortuosity in Sparks and Lightning Channels
Previous Article in Journal
Application of Artificial Neural Networks in the Prediction of PM10 Levels in the Winter Months: A Case Study in the Tricity Agglomeration, Poland
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Atmosphere 2018, 9(6), 204; https://doi.org/10.3390/atmos9060204

The Impact of Cumulative Negative Air Temperature Degree-Days on the Appearance of Ice Cover on a River in Relation to Atmospheric Circulation

1
Department of Hydrology and Water Management, Institute of Physical Geography and Environmental Planning, Adam Mickiewicz University in Poznan, Bogumiła Krygowskiego 10 Str., 61-680 Poznan, Poland
2
Department of Climatology, Institute of Physical Geography and Environmental Planning, Adam Mickiewicz University in Poznan, Bogumiła Krygowskiego 10 Str., 61-680 Poznan, Poland
*
Author to whom correspondence should be addressed.
Received: 4 April 2018 / Revised: 18 May 2018 / Accepted: 21 May 2018 / Published: 23 May 2018
(This article belongs to the Section Biosphere/Hydrosphere/Land - Atmosphere Interactions)
View Full-Text   |   Download PDF [5053 KB, uploaded 23 May 2018]   |  

Abstract

The article presents the results of an analysis of the impact of cumulative negative air temperature degree-days (CDD) on formation of ice cover on the typical lowland river in the moderate climate zone (River Noteć, western Poland). During the period 1987–2013 the occurrence of a series of 306 consecutive days of negative air temperatures was identified in relation to atmospheric circulation in the winter seasons, with a duration of 1–53 days. The longest CDD series occurred in 2010, while low air temperatures were particularly frequent in the year 1996 (−600 °C·d). The analysis showed that this phenomenon was most identifiable in December. Research made it possible to distinguish two types of circulation, which were conducive to the cumulation of CDD. Using the logistic regression model it was determined that the probability of ice cover occurrence increased most rapidly in the lower course (−70 °C·d), while the weakest interdependence was observed along the other sections. On average, a one-degree-day increase of CDD was connected with an increase in the probability of a permanent ice cover appearing of approximately 1.2–5.7%. The results obtained are of particular significance for identifying the thermal and circulatory factors determining the appearance of ice cover on the rivers of the Polish Lowlands. View Full-Text
Keywords: air temperature; atmospheric circulation; cumulative freezing degree-days; ice cover; logistic regression model; lowland river air temperature; atmospheric circulation; cumulative freezing degree-days; ice cover; logistic regression model; lowland river
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Graf, R.; Tomczyk, A.M. The Impact of Cumulative Negative Air Temperature Degree-Days on the Appearance of Ice Cover on a River in Relation to Atmospheric Circulation. Atmosphere 2018, 9, 204.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Atmosphere EISSN 2073-4433 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top