AMSR-E/AMSR2 Arctic sea ice 

concentration（DPR）

• Data introduction

AMSR-E (2002-2011) and AMSR2 (2012-present) 12.5km and 10.0km gridded standard brightness temperature data have been publicly released by institutions and universities such as JAXA, NSIDC and Bremen University. Website query. The sea ice intensity product was developed by the Ocean University of China (OUC) Polar Ocean Process and Global Ocean Change Key Laboratory (POGOC) and the Ministry of Education Key Laboratory of Physical Oceans (POL). The brightness temperature based on JAXA meshing is obtained by inversion of dual-polarized ratio (DPR).

Data time span: AMSR-E: June 1, 2002 - October 4, 2011 AMSR2: July 2, 2012 to present; Time resolution: 1 day; Spatial resolution: 10km × 10km (Polar stereo grid ); Timeliness: JAXA gridded brightness temperature data 48 hours after release.

Since the spatial resolution of brightness temperature obtained by AMSR-E and AMSR2 in the same frequency band (36.5 GHz) is similar, we use the same parameters when inverting the sea ice products of AMSR-E and AMSR2 by DPR algorithm.

Note: The sea ice product calibration work of AMSR-E/ AMSR2, which is currently inversion using the DPR algorithm, is still in progress. For partial verification work, see Zhang et al (2013; 2018). Now our team is conducting a broader range of validation, such as applying MODIS imagery data, SAR remote sensing data, and ship-based observations.

• Arctic quasi-real-time sea ice concentration (10km)

Arctic sea ice concentration distribution  (ASC: upshift)		Arctic sea ice concentration distribution  (DSC: derailment)

• Compared with similar products

A comparison of the Arctic sea ice concentration products of AMSR2 with a 10km grid based on the NT2 algorithm inversion published by JAXA.

(ASC: upshift)		(DSC: derailment)

• historical data

*Note: We only count the values of sea ice concentration greater than 15%: 2002-2011 is the result of AMSR-E; 2012-present is the result of AMSR2.

北Arctic sea ice range：

2002-2017 Arctic Sea Ice Range Time Series (Upgrade)		2002-2017 Arctic Sea Ice Range Time Series (Upgrade)

      北Arctic sea ice area：

Time series of Arctic sea ice area 2002-2017 (upgrade)		Time series of Arctic sea ice area 2002-2017 (derailed)

• Sea ice minimum

The distribution of sea ice in a few historical records of the Arctic sea ice range: ASC is the uptrend; DSC is the derailment.

• Data download

  
  

DPR product data (sea ice intensity inversion data and images)

AMSR-E、AMSR2

Other data

The sea ice intensity product inverted by the NT2 algorithm of the 10km grid can be downloaded at https://gcom-w1.jaxa.jp/auth.html.

• References

If you use the relevant data on this website to publish articles or publications, please acknowledge and quote the article:

Zhang Shugang,Jinping Zhao,  Karen Frey, and Jie Su, Dual-polarized ratio algorithm for  retrieving Arctic sea ice concentration from passive microwave brightness temperature. Journal of Oceanography, 69(2): 215-227, DOI: 10.1007/s10872-012-0167-z.

Zhang Shugang, Zhao Jinping et.al,  An improved dual-polarized ratio algorithm for sea ice conentration retrieval from passive microwave satellite data and inter-comparison with ASI, ABA and NT2. Journal of Oceanology and Limnology, 36(5): 1494-1508, 2018.