Tröskloge i Färnäs, Mora sn

Dendrokronologisk undersökning

av Torbjörn Axelson, april 2023

© foto: Peter Lindner

Trösklogen efter upprustning våren 2023.
Fick i oktober 2022 en skiva av en utbytt syllstock från en tröskloge, 61.00308, 14.62641, i Färnäs, Mora sn. I april 2023 fick jag sju borrprov (tillväxtborr 5 mm) ur samma byggnad. Syllen har yttersta ring från 1594 (viss blånad) och en klivstock yttersta ring i tynande ved 1587 (torrtall?). Prov ur D9, A10 och D20 har yttersta ring från 1595. Dessa fem stockar torde kunna antas vara från den ursprungliga trösklogen, som bör vara timmrad ca 1596. Timret har låg inbördes likhet, kanske beståndsspritt. De återstående tre virkena är alla från olika decennier under 1800-talet. A16 har yttersta ring från omkring 1819, A13 är fälld tidig försommar 1846 och D19 yttersta ring från 1880. Om detta bör tolkas som tre olika omtimringar under 1800-talet eller om man återanvänt virke vid ett eller två tillfällen må övervägas. A13 och A16 kan komma från samma bestånd.



Denna och andra dendrokronologiska studier av T. Axelson återfinns på taxelson.se/dendro/obj/

Korrelationsvärden

Strong red means high corr, white means zero corr or less. The rings are intended to cover most of the area in which the samples of the chronology are collected. A big ring chronology is not necessarily stronger than a small ring one, just including samples from a wider area.
22AR0a (syll) Träd med blandad nederbörd/temperatursignal 1381–1594
Strong red means high corr, white means zero corr or less. The rings are intended to cover most of the area in which the samples of the chronology are collected. A big ring chronology is not necessarily stronger than a small ring one, just including samples from a wider area.
234BA7 (D20) Är ett mer temperaturkänsligt träd 1388–1595
Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
22AR0a.pos dated to 1594 with corr >= 0,33 and with overlap >= 189 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,46   7,46   213    18   based on 6 members
se007      0,41   6,58   213    22    1888  Dalarna region (Bartholin, proj extraterastrial)   PISY               
Alvd21     0,40   6,35   213    16    1729  Block of Alvd21
SodraDal   0,39   6,13   213    10    2005  Dalarna söder om Siljan. Sammansatt. (Floda, Grangärde, Gagnef, Svärds
swed335    0,39   5,86   195     8    2012  Grangarde, Dalarna, T Axelson
FlodaSn0   0,38   5,65   189     2    2005  Floda sn, Dalarna T. A 2006? (annat än swed305, hårt sovrat)          
JAEMTUA_   0,33   5,15   213     2    1827  JAEMTUA1 Jämtland, historisch (Schweingruber) PISY only/PISY/JAEMTUA2 



Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
234BA1.pos dated to 1587 with corr >= 0,29 and with overlap >= 184 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,36   5,14   184    15   based on 4 members
swed335    0,35   5,12   184    22    2012  Grangarde, Dalarna, T Axelson
SodraDal   0,32   4,50   184    15    2005  Dalarna söder om Siljan. Sammansatt. (Floda, Grangärde, Gagnef, Svärds
se007      0,30   4,20   184    17    1888  Dalarna region (Bartholin, proj extraterastrial)   PISY               
NLPISY03   0,29   4,11   184     8    1717  Zuid-Noorweg, konstruktionsvirke återfunnet i Nederländerna, van Daale



Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
234BA2.pos dated to 1819 with corr >= 0,37 and with overlap >= 168 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,42   6,02   168     9   based on 5 members
swed336    0,40   5,55   168     3  Safsnas, Dalarna
SodraDal   0,40   5,54   168     9  Dalarna söder om Siljan. Sammansatt. (Floda, Grangärde, Gagnef, Svärds
norw018    0,38   5,27   168     9  Southern Trysil, 500m PISY
swed305    0,37   5,08   168     6  Björbo, Dalarna, T. Axelson, PISY, 300m                               
se007      0,37   5,08   168    11  Dalarna region (Bartholin, proj extraterastrial)   PISY               



Strong red means high corr, white means zero corr or less. The rings are intended to cover most of the area in which the samples of the chronology are collected. A big ring chronology is not necessarily stronger than a small ring one, just including samples from a wider area.
234BA3 (D9) tydligt nederbördskänsligt träd 1523-1595
Strong red means high corr, white means zero corr or less. The rings are intended to cover most of the area in which the samples of the chronology are collected. A big ring chronology is not necessarily stronger than a small ring one, just including samples from a wider area.
234BA4 (A10) tydligt nederbördskänsligt träd 1535-1595
Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
234BA3.pos dated to 1595 with corr >= 0,41 and with overlap >= 72 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,55   5,45    72    11   based on 5 members
swed305    0,55   5,53    72    13    Björbo, Dalarna, T. Axelson, PISY, 300m                               
swed335    0,44   4,08    72     5    Grangarde, Dalarna, T Axelson
SodraDal   0,44   4,05    72    12    Dalarna söder om Siljan. Sammansatt. (Floda, Grangärde, Gagnef, Svärds
GagnefSo   0,43   4,03    72    20    Gagnef-Djura (Israels, B. 2007)                                       
forssa     0,41   3,77    72    10    Forssa, finl


Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
234BA4.pos dated to 1595 with corr >= 0,38 and with overlap >= 60 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,48   4,13    60    13   based on 4 members
BumyrRel   0,44   3,77    60     1    Bumyran, Björbo + relaterade ur Södra dalarna, PISY (experimentell kro
swed335    0,42   3,50    60    12    Grangarde, Dalarna, T Axelson
SodraDal   0,40   3,36    60     9    Dalarna söder om Siljan. Sammansatt. (Floda, Grangärde, Gagnef, Svärds
NLPISY03   0,38   3,11    60     3    Zuid-Noorweg, konstruktionsvirke återfunnet i Nederländerna, van Daale

Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
234BA5.pos dated to 1845 with corr >= 0,36 and with overlap >= 176 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,46   6,79   176    30   based on 7 members
SodraDal   0,45   6,67   176    28  Dalarna söder om Siljan. Sammansatt. (Floda, Grangärde, Gagnef, Svärds
swed305    0,44   6,40   176    20  Björbo, Dalarna, T. Axelson, PISY, 300m                               
se007      0,43   6,27   176    19  Dalarna region (Bartholin, proj extraterastrial)   PISY               
swed336    0,42   6,18   176    24  Safsnas, Dalarna
Kungsber   0,40   5,78   176    20  Kungsberg-Järbo-Lumsheden, västra Gästrikland (Jan-Olov Språng) PISY  
FlodaSn0   0,39   5,61   176    15  Floda sn, Dalarna T. A 2006? (annat än swed305, hårt sovrat)          
swed335    0,36   5,04   176    14  Grangarde, Dalarna, T Axelson


Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
234BA6.pos dated to 1880 with corr >= 0,39 and with overlap >= 133 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,54   7,35   133    22   based on 7 members
se007      0,51   6,78   133    21  Dalarna region (Bartholin, proj extraterastrial)   PISY               
SodraDal   0,50   6,61   133    23  Dalarna söder om Siljan. Sammansatt. (Floda, Grangärde, Gagnef, Svärds
swed305    0,49   6,43   133    26  Björbo, Dalarna, T. Axelson, PISY, 300m                               
FlodaSn0   0,46   5,93   133    17  Floda sn, Dalarna T. A 2006? (annat än swed305, hårt sovrat)          
swed336    0,43   5,39   133    13  Safsnas, Dalarna
swed008    0,42   5,24   133     6  ÖSTERSUND (Harlan), PISY                                              
norw018    0,39   4,87   133     4  Southern Trysil, 500m PISY


Cybis CDendro, Algorithm: P2YrsL: Proportion of last two years growth LIMITED (2,0,T,NoLog,1,2,6)
Correlations between best available references (PISY) and
234BA7.pos dated to 1595 with corr >= 0,30 and with overlap >= 197 
Results sorted according to decreasing correlation coefficient values.
                    T-  Over  Skel
           Corr   Test   lap  Chi2
all...     0,40   6,29   207     9   based on 3 members
Alvd21     0,37   5,63   207     7  Block of Alvd21
JAEMTUA_   0,36   5,44   207    13  JAEMTUA1 Jämtland, historisch (Schweingruber) PISY only/PISY/JAEMTUA2 
Grangard   0,30   4,36   197    11  Grangärde, Dalarna  Axelson (2009) PISY                               


Mätdata (ringbredder)

visa som diagram
22AR   1 Tröskloge, Färnäs, Mora sn W                        PISY
22AR   2 Sweden       Pinus sylvestris                             1381 1880
22AR   3 T. Axelson, S. Östberg
22AR0a  1381   403   306   272   346   317   316   268   233   147
22AR0a  1390   167   139   173   195   172   153   186   156   142   130
22AR0a  1400   150   120   175   150   149   163   123   108   128   128
22AR0a  1410   150   123   106   115    95    97   124   115    99   107
22AR0a  1420   132   130   104   103    87    84    88   103    91    95
22AR0a  1430    95   100   106    94   101    60    53    51    55    57
22AR0a  1440    65    65    88    62    74    75    68    63    64    64
22AR0a  1450    62    58    55    54    57    47    42    46    53    46
22AR0a  1460    47    44    44    49    35    32    50    57    43    49
22AR0a  1470    30    40    54    37    48    46    36    43    48    50
22AR0a  1480    53    51    48    66    56    58    66    52    38    32
22AR0a  1490    41    44    43    50    36    48    36    46    47    43
22AR0a  1500    48    41    31    32    42    47    55    73    33    41
22AR0a  1510    36    31    28    35    31    27    30    43    29    32
22AR0a  1520    34    37    45    31    47    48    42    42    38    32
22AR0a  1530    34    27    29    37    36    35    31    35    45    42
22AR0a  1540    35    56    47    48    39    31    36    23    33    30
22AR0a  1550    38    50    39    40    40    36    35    31    46    43
22AR0a  1560    39    50    38    40    47    43    41    52    39    44
22AR0a  1570    46    48    39    34    36    41    34    37    31    37
22AR0a  1580    31    32    32    37    35    33    33    39    30    26
22AR0a  1590    32    25    21    24    35   999
22AR0a  #### Syllstock, utbytt
234BA1  1402   196   198   200   147   165   116   157   134
234BA1  1410   148   179   136   211   199   168   216   176   169   143
234BA1  1420   164   132   114   104   137   134   150   124    99    72
234BA1  1430   109   107    97    99   113    81    87    69    91   112
234BA1  1440   149   128    85   115    99    87    91    63   109   103
234BA1  1450    83   105    72    96   117    99    78    98    88    87
234BA1  1460    65    46    87    75    95    70    79    94    93   111
234BA1  1470    94    67    57    71   102    80    68  -999    46    74
234BA1  1480    76    68    67   103   105    92    73    97    80    76
234BA1  1490    77    80    85    70    71    73    70    88    87    70
234BA1  1500    65    79   106    87    64    67    71    68    93   103
234BA1  1510    81    53    83    91    53    59    48    55    56    64
234BA1  1520    66    82    87    48    46    76    91    94    64    44
234BA1  1530    28    25    30    36    36    27    30    30    30    27
234BA1  1540    25    29    30    31    21    27    30    21    29    17
234BA1  1550    23    33    26    26    29    27    31    25    31    34
234BA1  1560    28    31    18    25    22    20    26    30    23    22
234BA1  1570    32    22    14    24    18    23    20    19    22    19
234BA1  1580    20    22    16    14    11     9    10    15   999
234BA1  #### Klivstock, ytan tynande. fragmenterat prov. osäkert
234BA2  1649   167
234BA2  1650   163   147   101   108    73   226   330   253   223   168
234BA2  1660   206   155   127   120   163   145   118   114    96   130
234BA2  1670   194   183   198   164    97    74    30    23    19    26
234BA2  1680    62    53    95   106    42    29    30    33    35    17
234BA2  1690    27    53    52    75    79    70    64    62    42    52
234BA2  1700    43    49    59    85    52    62    42    33    20    26
234BA2  1710    29    32    40    42    42    37    41    50    42    63
234BA2  1720    75    72    83    72    57    31    65    78    54    54
234BA2  1730    54    42    37    34    46    31    22    13    32    20
234BA2  1740    27     6    19    25    20    16     7     9    19    22
234BA2  1750    32    42    50    59    53    40    32    32    37    76
234BA2  1760    82    82   106   128   156   123   107    85    63    72
234BA2  1770    54    51    61    53    35    36    51    66    80    47
234BA2  1780    38    35    41    44    54    53    36    23    17    13
234BA2  1790    10    19    15    16    23    19    16    13    12    20
234BA2  1800     8    11    21    13    16    14     7    12  -999  -999
234BA2  1810    14    24    24    28    20    27    19    19    19    51
234BA2  1820   999
234BA2  #### A16, ytveden osäker (0-ringar)
234BA3  1523   323   259   331   269   203   206   257
234BA3  1530   223   198   202   214   227   199   190   178   132   161
234BA3  1540   134   150   149   131   123   135   143   160   138   130
234BA3  1550   149   122   135   132    99    89    90    92   109    96
234BA3  1560    94    92    97    97   112   107   111   112    88    78
234BA3  1570   100    87    91    53    70    70    85    97    86    80
234BA3  1580    98    92    85   111   102    97    77    84    59    37
234BA3  1590    67    58    61    57    73    62   999
234BA3  #### D9
234BA4  1535   339   235   252   265   305
234BA4  1540   267   260   246   216   201   234   239   245   279   260
234BA4  1550   251   273   181   133   142   170   159   177   146   147
234BA4  1560   134   135   102   121   159   160   138   138   117   109
234BA4  1570   100   104    67    72    82    95   109   117   106    91
234BA4  1580   101    94    89    91    81    79    53    95   143    78
234BA4  1590    73    70    58    54    72    59   999
234BA4  #### A10
234BA5  1668   158   141
234BA5  1670   112   169   146   115    92    71    74    67   111    88
234BA5  1680    80    80    74    69    71    68    31  -999    13    17
234BA5  1690    27    29    33    36    63    76    65    70    76    58
234BA5  1700    95   113    96    73    62    72    78   116    65    33
234BA5  1710    46    48    49    53    63    49    72   112   136    96
234BA5  1720   101    85    88   114   103   127    88    87   105   102
234BA5  1730   117   108    77    77    88    85   102    71    99    75
234BA5  1740    64    53    49    66    57    39    23    31    39    23
234BA5  1750    28    30    52    39    32    30    22    12    23    21
234BA5  1760    29    36    52    77    65    71    93    62    46    57
234BA5  1770    43    45    70    83    67    66    72    88    88    75
234BA5  1780    44    30    33    20    28    32    28    31    17    21
234BA5  1790    18    24    34    29    33    32    30    38    29    39
234BA5  1800    25    33    31    22    16    14    18    26    21    35
234BA5  1810    29    39    63    50    56    58    58    61    76   114
234BA5  1820    68    53    51    39    26    24    57    37    41    25
234BA5  1830    27    20    21    21    25    11    20    20    29    22
234BA5  1840    20    19    27    23    23    24   999
234BA5  #### A13, +aning vårved, tillväxtkollaps 1686
234BA5b 1667   148   165   129
234BA5b 1670   134   115   113    94    68    64    59    52    89    90
234BA5b 1680    89   115    95   117   105    91    38  -999    11    19
234BA5b 1690    22   999
234BA5b #### tillväxtkollapsen 1686
234BA6  1747   106   136    75
234BA6  1750    97   148   214   148   152   114    94    54    55    89
234BA6  1760   103   137   129   167   165   186   181   121    76    84
234BA6  1770    81    56    66    60    31    38    69    79   117   132
234BA6  1780    94    96    98   110    83    90   105    98   112   125
234BA6  1790    83   107   108    90   108    78    70    50    78    74
234BA6  1800    54    93    88    89    86    56    87   112    74    58
234BA6  1810    63    96    76    69    50    54    60    77   101   128
234BA6  1820    88    81   115   118   105    84   104    72    94    67
234BA6  1830    60    51    31    32    48    37    58    42    56    58
234BA6  1840    69    48    63    60    64    59    60    48    53    56
234BA6  1850    66    56    31    19    32    36    32    33    43    52
234BA6  1860    65    28    27    41    34    22    21    19    35    55
234BA6  1870    67    75    53    36    42    57    77   123   148   135
234BA6  1880   101   999
234BA6  #### D19
234BA7  1388   467   382
234BA7  1390   425   330   263   340   299   258   304   263   262   220
234BA7  1400   194   200   187   166   175   200   173   133   110   138
234BA7  1410   164   142    97   135   115    87    63    78    85    82
234BA7  1420    83    82    53    52    82    77    84    80    86    57
234BA7  1430    71    51    68    49    67    40    37    35    44    49
234BA7  1440    55    49    48    45    38    46    28    23    31    30
234BA7  1450    44    33    48    31    34    44    34    45    41    33
234BA7  1460    40    47    45    41    38    29    42    45    40    32
234BA7  1470    24    25    31    29    40    53    35    32    42    31
234BA7  1480    45    36    31    28    39    37    42    37    26    26
234BA7  1490    25    18    29    25    21    20    38    30    24    27
234BA7  1500    28    31    28    36    33    33    40    35    34    41
234BA7  1510    31    20    26    23    19    29    25    20    13    15
234BA7  1520    19    20    28    12    33    19    30    24    25    19
234BA7  1530    20    16    20    28    21    29    19    16    19    25
234BA7  1540    29    33    30    26    29    31    31    19    21    28
234BA7  1550    28    29    18    22    28    19    12     9    11    17
234BA7  1560    23    28    19    19    19    37    46    44    44    28
234BA7  1570    34    30    26    23    25    25    14     7    12    19
234BA7  1580    18    21    19    11    15    17    17    17    15     8
234BA7  1590     6    10    11    13    12    14   999
234BA7  #### D20, oklar ytved