J 2012

Cereal harvest dates in the Czech Republic between 1501 and 2008 as a proxy for March–June temperature reconstruction

MOŽNÝ, Martin, Rudolf BRÁZDIL, Petr DOBROVOLNÝ a Mirek TRNKA

Základní údaje

Originální název

Cereal harvest dates in the Czech Republic between 1501 and 2008 as a proxy for March–June temperature reconstruction

Autoři

MOŽNÝ, Martin (203 Česká republika, garant), Rudolf BRÁZDIL (203 Česká republika, domácí), Petr DOBROVOLNÝ (203 Česká republika, domácí) a Mirek TRNKA (203 Česká republika)

Vydání

Climatic Change, Dordrecht-Boston-London, Kluwer Academic Publishers, 2012, 0165-0009

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 3.634

Kód RIV

RIV/00216224:14310/12:00057332

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000299346900017

Klíčová slova česky

data počátku žní; rekonstrukce teploty vzduchu

Klíčová slova anglicky

cereal harvest; temperature reconstruction
Změněno: 9. 4. 2013 14:53, Ing. Andrea Mikešková

Anotace

V originále

Cereal crop harvests reflect the weather patterns of the period immediately preceding them, and thus the dates at which they begin may be used as a source of proxy data on regional climate. Using systematic phenological observations in the Czech Lands (now known as the Czech Republic) after 1845, together with exploration of further surviving documentary evidence (chronicles,diaries, financial accounts etc.), it has proved possible to create series of winter wheat harvest dates for the period 1501–2008. Employing linear regression, the harvesting dates of the main cereal species (wheat, rye, barley, oats) were first converted to winter wheat harvest days and then normalised to the same altitude above sea level. The next step consisted of using series of winter wheat harvest dates to reconstruct mean March–June temperatures in the Czech Republic, applying standard palaeoclimatological methods. Series reconstructed by linear regression explain 70% of temperature variability. A profound cold period corresponding with late winter wheat harvests was noted between 1659 and 1705. In contrast, warm periods (i.e. early winter wheat harvests) were found for the periods of 1517–1542, 1788–1834 and 1946–2008. Theperiod after 1951 is the warmest of all throughout the entire 1501–2008 period. Comparisons with other European temperature reconstructions derived from documentary sources (including grape harvest dates), tree-rings and instrumental data reveal generally close agreement, with significant correlations. Lower correlations around A.D. 1650 and 1750 may be partly related to deterioration of socio-economic conditions in the Czech Lands resulting from prolonged wars. The results obtained demonstrate that it is possible to use widely-available cereal harvest data for climate analysis and also that such data constitute an independent proxy data series for the region of Central Europe crucial to further studies of the potential impact of climatic variability and climate change on agriculture.

Návaznosti

GA521/08/1682, projekt VaV
Název: Vliv klimatické variability a meteorologických extrémů na produkci vybraných plodin v letech 1801-2007
Investor: Grantová agentura ČR, Vliv klimatické variability a meteorologických extrémů na produkci vybraných plodin v letech 1801-2007