Category: O2

This map shows the sea surface temperature around Japan from January to April 2023.

Month	n	Min	25%	50%	Mean	75%	Max	SD
Jan	219225	-1.37	11.94	19.23	17.14	22.76	26.76	6.80
Feb	215832	-1.81	10.88	18.43	16.42	22.15	26.05	6.95
Mar	210268	-1.32	11.65	19.04	17.12	22.41	26.06	6.47
Apr	222005	-1.04	12.29	19.28	17.59	23.25	27.03	6.75

The mean and standard deviation, along with other statistics, show slight changes over time. However, the map and its legend reveal a more significant shift: the area with sea surface temperatures (SST) exceeding 25 degrees Celsius has been expanding. Counting the number of points with SST above 25 degrees Celsius highlighted this difference; points observed in April were four times the number of those in March. In contrast, the number of points with SST below 10 degrees Celsius has remained stable for four months. These contrasting trends in high and low temperature points motivate depicting histograms to visualize the data distribution.

Month	Above 25 (C)	Below 10 (C)
Jan	13846	41011
Feb	8272	48011
Mar	5786	39707
Apr	25632	39389

The data used comes from SST and SST Anomaly, NOAA Global Coral Bleaching Monitoring, 5km, V.3.1, Monthly, 1985-Present. This map is created with O2 where you can load the various satellite data. This sea surface temperature data will be available soon on O2.

You can create an account directly on O2 to access the data and visualizations.

This map shows the sea surface temperature around Japan from May to August 2023. The summarized data is on the table below.

Month	n	Min	25%	50%	Mean	75%	Max	SD
May	232069	0.46	14.96	20.49	19.13	24.33	28.60	6.52
Jun	237293	3.73	20.06	23.45	22.34	26.89	29.53	5.61
Jul	237578	8.30	23.93	27.28	25.71	29.16	30.47	4.47
Aug	237578	9.80	27.23	28.69	27.23	29.02	30.57	3.40

The standard deviation gradually decreases while the mean increases as summer arrives in the northern hemisphere. This highlights one of the key points in time-series data analysis: carefully observing changes in standard deviation and exploring the reasons behind these shifts over time.

The data used comes from SST and SST Anomaly, NOAA Global Coral Bleaching Monitoring, 5km, V.3.1, Monthly, 1985-Present. This map is created with O2 where you can load the various satellite data. This sea surface temperature data will be available soon on O2.

You can create an account directly on O2 to access the data and visualizations.

This map shows the sea surface temperature around Japan from September to December 2023. The table described below summarizes the data.

Month	n	Min	25%	50%	Mean	75%	Max	SD
Sep	237578	9.60	25.40	28.53	26.75	29.18	30.03	3.61
Oct	237578	8.38	21.28	25.97	24.00	27.99	29.74	5.09
Nov	236943	3.63	17.36	23.29	21.19	25.99	29.03	6.21
Dec	229384	-0.27	14.14	21.20	19.01	24.54	28.58	7.02

An interesting point is that the standard deviation gradually increases while the mean decrease as winter arrives in the northern hemisphere.

The data used comes from SST and SST Anomaly, NOAA Global Coral Bleaching Monitoring, 5km, V.3.1, Monthly, 1985-Present. This map is created with O2 where you can load the various satellite data. This sea surface temperature data will be available soon on O2.

You can create an account directly on O2 to access the data and visualizations.

The purpose of this map is to illustrate the daytime land surface temperature from January 2022 to December 2023. The data had been collected by 8 days. The range was between -33.97 and 55.93 degrees Celsius. The highest temperatures reached over 55 degrees Celsius in August 2022. This was observed around Sendai area in Tohoku region. The data comes from JAXA Earth API., and the map was created using O2 to visualize this data.

You will directly create the account here, and then directly access to O2 from your page.

This map shows the nighttime land surface temperature from January 2022 to December 2023. The data had been collected by 8 days. The range was between -8.03 and 38.09 degrees Celsius. Summer temperatures reached highs of over 35 degrees Celsius in both 2022 and 2023. Plus, you can see that temperatures dropped suddenly from November to December 2023. The data comes from JAXA Earth API., and the map was created using O2 to visualize this data.

You will directly create the account here, and then directly access to O2 from your page.

This is a map to illustrate the transition of land price from 1983 to 2003 in Kanto region. It could be obviously considered that the current land price increase has been occuring in the area only around Tokyo and Kanagawa. The used data comes from 国土数値情報. The MLIT data can be downloaded from 地価公示データ, and the prefecture data is based on 都道府県地価調査.

You will directly create the account here, and then directly access to O2 from your page.

This map shows the land price transition from 1983 to 2023 in Saitama. The used data comes from 国土数値情報. The MLIT data can be downloaded from 地価公示データ, and the prefecture data is based on 都道府県地価調査.

You will directly create the account here, and then directly access to O2 from your page.

This map explains the land price transition from 1983 to 2023 in Chiba Prefecture, Japan. The used data comes from 国土数値情報. The MLIT data can be downloaded from 地価公示データ, and the prefecture data is based on 都道府県地価調査.

You will directly create the account here, and then directly access to O2 from your page.

This map explains the land price transition from 1983 to 2023 in Kanagawa Prefecture, Japan. The used data comes from 国土数値情報. The MLIT data can be downloaded from 地価公示データ, and the prefecture data is based on 都道府県地価調査.

You will directly create the account here, and then directly access to O2 from your page.

This map shows the land price transition from 1983 to 2023 in Tokyo. The used data comes from 国土数値情報. The MLIT data can be downloaded from 地価公示データ, and the prefecture data is based on 都道府県地価調査.

You will directly create the account here, and then directly access to O2 from your page.