Class information for:
Level 1: PERMAFROST//PERMAFROST AND PERIGLACIAL PROCESSES//ACTIVE LAYER

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
2327 2281 47.8 50%


Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
4 4 ENVIRONMENTAL SCIENCES//GEOSCIENCES, MULTIDISCIPLINARY//METEOROLOGY & ATMOSPHERIC SCIENCES 1766162
524 3       JOURNAL OF GLACIOLOGY//COLD REGIONS SCIENCE AND TECHNOLOGY//ANNALS OF GLACIOLOGY 20397
2394 2             PERMAFROST//STATE FROZEN SOIL ENGN//COLD REGIONS SCIENCE AND TECHNOLOGY 4235
2327 1                   PERMAFROST//PERMAFROST AND PERIGLACIAL PROCESSES//ACTIVE LAYER 2281

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 PERMAFROST authKW 3149652 26% 40% 591
2 PERMAFROST AND PERIGLACIAL PROCESSES journal 1628901 13% 43% 286
3 ACTIVE LAYER authKW 732619 6% 43% 126
4 THERMOKARST authKW 713815 4% 67% 80
5 GROUND ICE authKW 379034 2% 60% 47
6 THERMOKARST LAKES authKW 377093 2% 78% 36
7 ICE WEDGES authKW 334606 2% 71% 35
8 PALSA authKW 278847 1% 83% 25
9 PERMAFROST DEGRADATION authKW 224218 1% 51% 33
10 LITHALSA authKW 214161 1% 100% 16

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 Geography, Physical 80048 32% 1% 719
2 Geosciences, Multidisciplinary 35301 46% 0% 1041
3 Geology 27049 15% 1% 349
4 Environmental Sciences 5160 24% 0% 547
5 Meteorology & Atmospheric Sciences 3307 11% 0% 257
6 Water Resources 3252 11% 0% 243
7 Soil Science 1020 4% 0% 98
8 Geography 874 3% 0% 70
9 Ecology 808 8% 0% 176
10 Engineering, Environmental 603 5% 0% 106

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 PERMAFROST 165578 2% 35% 35
2 MELNIKOV PERMAFROST 154226 1% 52% 22
3 PERIGLACIAL 138040 1% 54% 19
4 NO ENGN 123434 1% 29% 32
5 SNOW ICE DATA 109635 2% 15% 55
6 CRYOSPHERE STN QINGHAI TIBET PLATEAU 107072 1% 67% 12
7 STATE FROZEN SOIL ENGN 104467 3% 12% 63
8 WATER ENVIRONM 103390 4% 8% 97
9 ALASKA COOPERAT FISH WILDLIFE UNIT 96727 2% 16% 45
10 COLD ARID REG ENVIRONM ENGN 91773 7% 5% 149

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 PERMAFROST AND PERIGLACIAL PROCESSES 1628901 13% 43% 286
2 JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 42563 3% 4% 72
3 ARCTIC AND ALPINE RESEARCH 40077 2% 6% 50
4 CRYOSPHERE 36397 2% 5% 51
5 COLD REGIONS SCIENCE AND TECHNOLOGY 35796 3% 4% 76
6 ARCTIC ANTARCTIC AND ALPINE RESEARCH 31033 2% 5% 50
7 CANADIAN JOURNAL OF EARTH SCIENCES 20035 4% 2% 86
8 ENVIRONMENTAL RESEARCH LETTERS 18262 2% 3% 54
9 JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 15884 2% 3% 43
10 ARCTIC 12915 2% 3% 38

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 PERMAFROST 3149652 26% 40% 591 Search PERMAFROST Search PERMAFROST
2 ACTIVE LAYER 732619 6% 43% 126 Search ACTIVE+LAYER Search ACTIVE+LAYER
3 THERMOKARST 713815 4% 67% 80 Search THERMOKARST Search THERMOKARST
4 GROUND ICE 379034 2% 60% 47 Search GROUND+ICE Search GROUND+ICE
5 THERMOKARST LAKES 377093 2% 78% 36 Search THERMOKARST+LAKES Search THERMOKARST+LAKES
6 ICE WEDGES 334606 2% 71% 35 Search ICE+WEDGES Search ICE+WEDGES
7 PALSA 278847 1% 83% 25 Search PALSA Search PALSA
8 PERMAFROST DEGRADATION 224218 1% 51% 33 Search PERMAFROST+DEGRADATION Search PERMAFROST+DEGRADATION
9 LITHALSA 214161 1% 100% 16 Search LITHALSA Search LITHALSA
10 PERMAFROST THAW 184448 1% 66% 21 Search PERMAFROST+THAW Search PERMAFROST+THAW

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.


Rank Reference # ref. in
cl.		 Shr. of ref. in
cl.		 Citations
1 WALVOORD, MA , KURYLYK, BL , (2016) HYDROLOGIC IMPACTS OF THAWING PERMAFROST-A REVIEW.VADOSE ZONE JOURNAL. VOL. 15. ISSUE 6. P. - 115 78% 6
2 SCHUUR, EAG , MCGUIRE, AD , SCHADEL, C , GROSSE, G , HARDEN, JW , HAYES, DJ , HUGELIUS, G , KOVEN, CD , KUHRY, P , LAWRENCE, DM , ET AL (2015) CLIMATE CHANGE AND THE PERMAFROST CARBON FEEDBACK.NATURE. VOL. 520. ISSUE 7546. P. 171 -179 52 68% 165
3 VONK, JE , TANK, SE , BOWDEN, WB , LAURION, I , VINCENT, WF , ALEKSEYCHIK, P , AMYOT, M , BILLET, MF , CANARIO, J , CORY, RM , ET AL (2015) REVIEWS AND SYNTHESES: EFFECTS OF PERMAFROST THAW ON ARCTIC AQUATIC ECOSYSTEMS.BIOGEOSCIENCES. VOL. 12. ISSUE 23. P. 7129 -7167 120 43% 19
4 KOKELJ, SV , JORGENSON, MT , (2013) ADVANCES IN THERMOKARST RESEARCH.PERMAFROST AND PERIGLACIAL PROCESSES. VOL. 24. ISSUE 2. P. 108-119 61 90% 45
5 VON DEIMLING, TS , GROSSE, G , STRAUSS, J , SCHIRRMEISTER, L , MORGENSTERN, A , SCHAPHOFF, S , MEINSHAUSEN, M , BOIKE, J , (2015) OBSERVATION-BASED MODELLING OF PERMAFROST CARBON FLUXES WITH ACCOUNTING FOR DEEP CARBON DEPOSITS AND THERMOKARST ACTIVITY.BIOGEOSCIENCES. VOL. 12. ISSUE 11. P. 3469 -3488 65 72% 9
6 HUGELIUS, G , STRAUSS, J , ZUBRZYCKI, S , HARDEN, JW , SCHUUR, EAG , PING, CL , SCHIRRMEISTER, L , GROSSE, G , MICHAELSON, GJ , KOVEN, CD , ET AL (2014) ESTIMATED STOCKS OF CIRCUMPOLAR PERMAFROST CARBON WITH QUANTIFIED UNCERTAINTY RANGES AND IDENTIFIED DATA GAPS.BIOGEOSCIENCES. VOL. 11. ISSUE 23. P. 6573 -6593 40 78% 107
7 FREY, KE , MCCLELLAND, JW , (2009) IMPACTS OF PERMAFROST DEGRADATION ON ARCTIC RIVER BIOGEOCHEMISTRY.HYDROLOGICAL PROCESSES. VOL. 23. ISSUE 1. P. 169 -182 66 63% 156
8 ATCHLEY, AL , COON, ET , PAINTER, SL , HARP, DR , WILSON, CJ , (2016) INFLUENCES AND INTERACTIONS OF INUNDATION, PEAT, AND SNOW ON ACTIVE LAYER THICKNESS.GEOPHYSICAL RESEARCH LETTERS. VOL. 43. ISSUE 10. P. 5116 -5123 44 86% 3
9 CHRISTIANSEN, HH , MATSUOKA, N , WATANABE, T , (2016) PROGRESS IN UNDERSTANDING THE DYNAMICS, INTERNAL STRUCTURE AND PALAEOENVIRONMENTAL POTENTIAL OF ICE WEDGES AND SAND WEDGES.PERMAFROST AND PERIGLACIAL PROCESSES. VOL. 27. ISSUE 4. P. 365 -376 71 65% 0
10 BRING, A , FEDOROVA, I , DIBIKE, Y , HINZMAN, L , MARD, J , MERNILD, SH , PROWSE, T , SEMENOVA, O , STUEFER, SL , WOO, MK , (2016) ARCTIC TERRESTRIAL HYDROLOGY: A SYNTHESIS OF PROCESSES, REGIONAL EFFECTS, AND RESEARCH CHALLENGES.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES. VOL. 121. ISSUE 3. P. 621 -649 79 36% 8

Classes with closest relation at Level 1


Rank Class id link
1 6675 ROCK GLACIER//PERMAFROST AND PERIGLACIAL PROCESSES//MOUNTAIN PERMAFROST
2 8133 STATE FROZEN SOIL ENGN//COLD REGIONS SCIENCE AND TECHNOLOGY//FROZEN SOIL
3 2615 TUNDRA//ARCTIC TUNDRA//ITEX
4 20787 LIGNIN PHENOLS//PACIFIC OCEANOL//CUO OXIDATION
5 13157 ALASKA QUATERNARY//BERINGIA//LAKE ELGYGYTGYN
6 16238 ICE JAM//RIVER ICE//FRAZIL ICE
7 451 PEATLAND//SPHAGNUM//BOG
8 31948 BIOSPHERE MODELLING//LAKE PEIPSI CHUDSKOE//REFERENCE BIOSPHERE
9 7567 LAKE METABOLISM//ALLOCHTHONY//THEMAT STUDIES WATER ENVIRONM STUDIES
10 27220 SOIL FROST//WINTER CLIMATE CHANGE//SOIL FREEZING

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